diff --git a/apps/backend/.env.example b/apps/backend/.env.example
index f36551e..8dff67f 100644
--- a/apps/backend/.env.example
+++ b/apps/backend/.env.example
@@ -8,3 +8,13 @@ APP_SECRET_KEY=change_me
 
 APP_CORS_ORIGINS=http://localhost:4200
 DATABASE_URL=postgresql+asyncpg://enervision:change_me@localhost:5433/enervision
+
+# Mot de passe oublié : lien à usage unique valable 15 minutes par défaut.
+APP_FRONTEND_RESET_PASSWORD_URL=http://localhost:4200/reset-password
+
+# SMTP local de dev (Mailpit, cf. docker-compose.yml) : aucune authentification, aucun TLS.
+# À remplacer par un vrai relais en staging/prod.
+APP_SMTP_HOST=localhost
+APP_SMTP_PORT=1025
+APP_SMTP_USE_TLS=false
+APP_SMTP_FROM_ADDRESS=no-reply@enervision.fr
diff --git a/apps/backend/README.md b/apps/backend/README.md
index 91f9608..6c48b3a 100644
--- a/apps/backend/README.md
+++ b/apps/backend/README.md
@@ -103,6 +103,8 @@ Le sens de dependance est unique : `endpoints` vers `services` vers `repositorie
 | `/api/v1/auth/logout` | Ferme la session courante | cookie, idempotente |
 | `/api/v1/auth/logout-all` | Ferme toutes les sessions du compte | jeton |
 | `/api/v1/auth/password` | Change son propre mot de passe | jeton |
+| `/api/v1/auth/forgot-password` | Demande un lien de réinitialisation par email | public |
+| `/api/v1/auth/reset-password` | Choisit un nouveau mot de passe depuis ce lien | public |
 | `/api/v1/auth/me` | Décrit le compte connecté | jeton |
 | `/api/v1/users` | Liste et crée des comptes | `admin` |
 | `/api/v1/users/{id}` | Change le rôle ou l'activation | `admin` |
diff --git a/apps/backend/alembic/versions/c0adab96238c_jetons_de_reinitialisation.py b/apps/backend/alembic/versions/c0adab96238c_jetons_de_reinitialisation.py
new file mode 100644
index 0000000..7f75d21
--- /dev/null
+++ b/apps/backend/alembic/versions/c0adab96238c_jetons_de_reinitialisation.py
@@ -0,0 +1,96 @@
+"""jetons et tentatives de reinitialisation de mot de passe
+
+Revision ID: c0adab96238c
+Revises: e6d2026091501
+Create Date: 2026-09-17 10:37:12.571314
+
+Meme schema que `refresh_token` pour `password_reset_token` : seule l'empreinte SHA-256 du
+jeton est stockee, jamais le jeton lui-meme, pour la meme raison (revocation en cascade,
+aucune session utilisable dans un pg_dump qui fuiterait).
+
+`password_reset_attempt` vit hors de `audit_log`, comme `login_attempt`, car son volume est
+pilote par l'attaquant : une campagne de demandes y ecrirait des lignes que l'audit, en ajout
+seul, ne devrait jamais purger.
+"""
+
+from collections.abc import Sequence
+
+import sqlalchemy as sa
+from alembic import op
+from sqlalchemy.dialects import postgresql
+
+revision: str = "c0adab96238c"
+down_revision: str | Sequence[str] | None = "e6d2026091501"
+branch_labels: str | Sequence[str] | None = None
+depends_on: str | Sequence[str] | None = None
+
+JETONS_VIVANTS = "consumed_at is null"
+
+
+def upgrade() -> None:
+    op.create_table(
+        "password_reset_attempt",
+        sa.Column("id", sa.BigInteger(), sa.Identity(always=True), nullable=False),
+        sa.Column(
+            "occurred_at",
+            sa.DateTime(timezone=True),
+            server_default=sa.text("now()"),
+            nullable=False,
+        ),
+        sa.Column("email_tried", sa.String(length=320), nullable=False),
+        sa.Column("client_ip", postgresql.INET(), nullable=True),
+        sa.PrimaryKeyConstraint("id", name="pk_password_reset_attempt"),
+    )
+    op.create_index(
+        "ix_password_reset_attempt_email_date",
+        "password_reset_attempt",
+        ["email_tried", "occurred_at"],
+    )
+    op.create_index(
+        "ix_password_reset_attempt_ip_date", "password_reset_attempt", ["client_ip", "occurred_at"]
+    )
+
+    op.create_table(
+        "password_reset_token",
+        sa.Column("id", sa.UUID(), server_default=sa.text("gen_random_uuid()"), nullable=False),
+        sa.Column("user_id", sa.UUID(), nullable=False),
+        sa.Column("token_hash", sa.LargeBinary(), nullable=False),
+        sa.Column(
+            "issued_at",
+            sa.DateTime(timezone=True),
+            server_default=sa.text("now()"),
+            nullable=False,
+        ),
+        sa.Column("expires_at", sa.DateTime(timezone=True), nullable=False),
+        sa.Column("consumed_at", sa.DateTime(timezone=True), nullable=True),
+        sa.Column("client_ip", postgresql.INET(), nullable=True),
+        sa.Column("user_agent", sa.Text(), nullable=True),
+        sa.ForeignKeyConstraint(
+            ["user_id"],
+            ["app_user.id"],
+            name="fk_password_reset_token_user",
+            ondelete="CASCADE",
+        ),
+        sa.PrimaryKeyConstraint("id", name="pk_password_reset_token"),
+        sa.UniqueConstraint("token_hash", name="uq_password_reset_token_hash"),
+    )
+    op.create_index("ix_password_reset_token_user", "password_reset_token", ["user_id"])
+    op.create_index(
+        "ix_password_reset_token_vivants",
+        "password_reset_token",
+        ["user_id"],
+        postgresql_where=JETONS_VIVANTS,
+    )
+
+
+def downgrade() -> None:
+    op.drop_index(
+        "ix_password_reset_token_vivants",
+        table_name="password_reset_token",
+        postgresql_where=JETONS_VIVANTS,
+    )
+    op.drop_index("ix_password_reset_token_user", table_name="password_reset_token")
+    op.drop_table("password_reset_token")
+    op.drop_index("ix_password_reset_attempt_ip_date", table_name="password_reset_attempt")
+    op.drop_index("ix_password_reset_attempt_email_date", table_name="password_reset_attempt")
+    op.drop_table("password_reset_attempt")
diff --git a/apps/backend/app/api/deps.py b/apps/backend/app/api/deps.py
index 4996917..ae5df24 100644
--- a/apps/backend/app/api/deps.py
+++ b/apps/backend/app/api/deps.py
@@ -16,6 +16,7 @@ from sqlalchemy.ext.asyncio import AsyncSession
 
 from app.core.config import Settings, get_settings
 from app.core.hashing import Argon2Hasher, build_hasher
+from app.core.mailer import Mailer, SmtpConfig
 from app.core.principal import Principal
 from app.core.roles import AccountKind, Role, has_at_least
 from app.core.security import TokenExpiredError, TokenInvalidError, TokenPolicy
@@ -24,13 +25,15 @@ from app.db.session import get_session
 from app.repositories.alert import AlertRepository
 from app.repositories.audit_log import AuditLogRepository
 from app.repositories.login_attempt import LoginAttemptRepository
+from app.repositories.password_reset_attempt import PasswordResetAttemptRepository
+from app.repositories.password_reset_token import PasswordResetTokenRepository
 from app.repositories.reading import ReadingRepository
 from app.repositories.recommendation import RecommendationRepository
 from app.repositories.refresh_token import RefreshTokenRepository
 from app.repositories.site import SiteRepository
 from app.repositories.user import UserRepository
 from app.services.alert import AlertService
-from app.services.auth import AuthService, LoginPolicy
+from app.services.auth import AuthService, LoginPolicy, PasswordResetPolicy
 from app.services.reading import ReadingService
 from app.services.recommendation import RecommendationService
 from app.services.sensor import SensorService
@@ -98,11 +101,27 @@ def get_client_ip(request: Request, settings: SettingsDep) -> str | None:
     return request.client.host if request.client else None
 
 
+def get_mailer(settings: SettingsDep) -> Mailer:
+    return Mailer(
+        SmtpConfig(
+            host=settings.smtp_host,
+            port=settings.smtp_port,
+            username=settings.smtp_username,
+            password=(
+                settings.smtp_password.get_secret_value() if settings.smtp_password else None
+            ),
+            use_tls=settings.smtp_use_tls,
+            from_address=settings.smtp_from_address,
+        )
+    )
+
+
 def get_auth_service(
     session: SessionDep,
     settings: SettingsDep,
     hasher: Annotated[Argon2Hasher, Depends(get_hasher)],
     token_policy: Annotated[TokenPolicy, Depends(get_token_policy)],
+    mailer: Annotated[Mailer, Depends(get_mailer)],
 ) -> AuthService:
     return AuthService(
         users=UserRepository(session),
@@ -119,6 +138,16 @@ def get_auth_service(
             max_failures_per_identifier=settings.login_max_failures_per_identifier,
         ),
         refresh_ttl=timedelta(seconds=settings.refresh_token_ttl_seconds),
+        reset_tokens=PasswordResetTokenRepository(session),
+        reset_attempts=PasswordResetAttemptRepository(session),
+        reset_policy=PasswordResetPolicy(
+            window_seconds=settings.password_reset_window_seconds,
+            max_requests_per_identifier=settings.password_reset_max_requests_per_identifier,
+            max_requests_per_ip=settings.password_reset_max_requests_per_ip,
+            token_ttl=timedelta(seconds=settings.password_reset_ttl_seconds),
+            frontend_reset_url=settings.frontend_reset_password_url,
+        ),
+        mailer=mailer,
     )
 
 
diff --git a/apps/backend/app/api/openapi.py b/apps/backend/app/api/openapi.py
index 15f88d2..9937467 100644
--- a/apps/backend/app/api/openapi.py
+++ b/apps/backend/app/api/openapi.py
@@ -164,3 +164,16 @@ REPONSE_ORIGINE_REFUSEE: Final[Reponses] = {
         "description": "Origine non autorisée (protection CSRF de `require_trusted_origin`).",
     },
 }
+
+REPONSE_LIMITE: Final[Reponses] = {
+    429: {
+        "model": ErrorResponse,
+        "description": "Trop de demandes sur cette fenêtre glissante.",
+        "headers": {
+            "Retry-After": {
+                "description": "Secondes à attendre avant une nouvelle tentative.",
+                "schema": {"type": "integer"},
+            }
+        },
+    },
+}
diff --git a/apps/backend/app/api/v1/endpoints/auth.py b/apps/backend/app/api/v1/endpoints/auth.py
index 32bf8b2..9fd374f 100644
--- a/apps/backend/app/api/v1/endpoints/auth.py
+++ b/apps/backend/app/api/v1/endpoints/auth.py
@@ -2,7 +2,7 @@
 # d'accès ne va jamais dans un cookie. C'est ce qui réduit la surface CSRF aux trois routes de
 # ce module : partout ailleurs, le navigateur n'attache rien de lui-même.
 
-from fastapi import APIRouter, Depends, HTTPException, Request, Response, status
+from fastapi import APIRouter, BackgroundTasks, Depends, HTTPException, Request, Response, status
 
 from app.api.deps import (
     AuthServiceDep,
@@ -12,6 +12,7 @@ from app.api.deps import (
     require_trusted_origin,
 )
 from app.api.openapi import (
+    REPONSE_LIMITE,
     REPONSE_ORIGINE_REFUSEE,
     REPONSE_VALIDATION,
     REPONSES_AUTHENTIFIEES,
@@ -21,15 +22,19 @@ from app.api.openapi import (
 from app.core.cookies import RefreshCookie, cookie_name
 from app.core.logging import get_logger
 from app.schemas.auth import (
+    ForgotPasswordRequest,
     LoginRequest,
     PasswordChangeRequest,
     PrincipalResponse,
+    ResetPasswordRequest,
+    ResetTokenValidationResponse,
     TokenResponse,
 )
 from app.schemas.errors import ErrorResponse
 from app.services.auth import (
     AuthenticatedSession,
     InvalidCredentialsError,
+    InvalidOrExpiredResetTokenError,
     RateLimitedError,
     SessionRejectedError,
 )
@@ -39,6 +44,7 @@ logger = get_logger(__name__)
 
 DETAIL_IDENTIFIANTS = "Identifiants invalides"
 DETAIL_SESSION = "Session invalide"
+DETAIL_LIEN_RESET = "Lien invalide ou expiré"
 
 REPONSES_LOGIN: Reponses = {
     **REPONSE_VALIDATION,
@@ -85,6 +91,20 @@ REPONSES_MOT_DE_PASSE: Reponses = {
     },
 }
 
+REPONSES_FORGOT_PASSWORD: Reponses = {
+    **REPONSE_VALIDATION,
+    **REPONSE_LIMITE,
+}
+
+REPONSES_RESET_PASSWORD: Reponses = {
+    **REPONSE_VALIDATION,
+    **REPONSE_ORIGINE_REFUSEE,
+    400: {
+        "model": ErrorResponse,
+        "description": "Lien invalide, déjà utilisé, ou expiré (durée de vie : 15 minutes).",
+    },
+}
+
 
 def repond(
     response: Response, settings: SettingsDep, session: AuthenticatedSession
@@ -267,3 +287,79 @@ async def change_password(
 
     logger.info("auth.password_changed user_id=%s", principal.id)
     return repond(response, settings, session)
+
+
+@router.post(
+    "/forgot-password",
+    status_code=status.HTTP_202_ACCEPTED,
+    summary="Demande un lien de réinitialisation par email",
+    responses=REPONSES_FORGOT_PASSWORD,
+)
+async def forgot_password(
+    payload: ForgotPasswordRequest,
+    request: Request,
+    response: Response,
+    service: AuthServiceDep,
+    background_tasks: BackgroundTasks,
+    client_ip: str | None = Depends(get_client_ip),
+) -> None:
+    response.headers["Cache-Control"] = "no-store"
+
+    try:
+        await service.request_password_reset(
+            email=payload.email,
+            client_ip=client_ip,
+            user_agent=request.headers.get("user-agent"),
+            background_tasks=background_tasks,
+        )
+    except RateLimitedError as erreur:
+        logger.warning("auth.password_reset.rate_limited ip=%s", client_ip)
+        raise HTTPException(
+            status_code=status.HTTP_429_TOO_MANY_REQUESTS,
+            detail="Trop de demandes, réessayez plus tard",
+            headers={"Retry-After": str(erreur.retry_after)},
+        ) from erreur
+
+
+@router.get(
+    "/reset-password/validate",
+    response_model=ResetTokenValidationResponse,
+    summary="Vérifie sans le consommer si un lien de réinitialisation est encore valide",
+    responses=REPONSE_VALIDATION,
+)
+async def validate_reset_token(token: str, service: AuthServiceDep) -> ResetTokenValidationResponse:
+    return ResetTokenValidationResponse(valid=await service.is_reset_token_valid(token=token))
+
+
+@router.post(
+    "/reset-password",
+    response_model=TokenResponse,
+    summary="Choisit un nouveau mot de passe depuis un lien reçu par email",
+    dependencies=[Depends(require_trusted_origin)],
+    responses=REPONSES_RESET_PASSWORD,
+)
+async def reset_password(
+    payload: ResetPasswordRequest,
+    request: Request,
+    response: Response,
+    settings: SettingsDep,
+    service: AuthServiceDep,
+    client_ip: str | None = Depends(get_client_ip),
+) -> TokenResponse:
+    response.headers["Cache-Control"] = "no-store"
+
+    try:
+        session = await service.confirm_password_reset(
+            token=payload.token,
+            new_password=payload.new_password,
+            client_ip=client_ip,
+            user_agent=request.headers.get("user-agent"),
+        )
+    except InvalidOrExpiredResetTokenError as erreur:
+        logger.warning("auth.password_reset.invalid_token ip=%s", client_ip)
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST, detail=DETAIL_LIEN_RESET
+        ) from erreur
+
+    logger.info("auth.password_reset.success user_id=%s", session.principal.id)
+    return repond(response, settings, session)
diff --git a/apps/backend/app/cli.py b/apps/backend/app/cli.py
index 37e94fd..f713fa5 100644
--- a/apps/backend/app/cli.py
+++ b/apps/backend/app/cli.py
@@ -9,6 +9,7 @@ import argparse
 import asyncio
 import json
 import secrets
+import string
 import sys
 from getpass import getpass
 from pathlib import Path
@@ -22,9 +23,9 @@ from app.core.roles import Role
 from app.db.session import get_session_factory
 from app.main import create_app
 from app.repositories.user import UserRepository
+from app.schemas.auth import PASSWORD_MIN_LENGTH, SPECIAL_CHARACTERS, valide_complexite
 
 LONGUEUR_MOT_DE_PASSE_GENERE = 24
-LONGUEUR_MINIMALE = 12
 CHEMIN_CONTRAT = Path(__file__).resolve().parent.parent / "openapi.json"
 
 
@@ -111,15 +112,34 @@ def build_parser() -> argparse.ArgumentParser:
     return parser
 
 
+def genere_mot_de_passe() -> str:
+    tirage = secrets.SystemRandom()
+    classes = [
+        string.ascii_uppercase,
+        string.ascii_lowercase,
+        string.digits,
+        SPECIAL_CHARACTERS,
+    ]
+    reste = LONGUEUR_MOT_DE_PASSE_GENERE - len(classes)
+    caracteres = [tirage.choice(classe) for classe in classes]
+    caracteres += [tirage.choice("".join(classes)) for _ in range(reste)]
+    tirage.shuffle(caracteres)
+    return "".join(caracteres)
+
+
 def read_password(*, generate: bool) -> str:
     if generate:
-        mot_de_passe = secrets.token_urlsafe(LONGUEUR_MOT_DE_PASSE_GENERE)
+        mot_de_passe = genere_mot_de_passe()
         print(f"Mot de passe généré, il ne sera plus affiché : {mot_de_passe}")
         return mot_de_passe
 
     mot_de_passe = getpass("Mot de passe : ")
-    if len(mot_de_passe) < LONGUEUR_MINIMALE:
-        raise SystemExit(f"Le mot de passe doit faire au moins {LONGUEUR_MINIMALE} caractères")
+    if len(mot_de_passe) < PASSWORD_MIN_LENGTH:
+        raise SystemExit(f"Le mot de passe doit faire au moins {PASSWORD_MIN_LENGTH} caractères")
+    try:
+        valide_complexite(mot_de_passe)
+    except ValueError as erreur:
+        raise SystemExit(str(erreur)) from erreur
     if mot_de_passe != getpass("Confirmation : "):
         raise SystemExit("Les deux saisies diffèrent")
     return mot_de_passe
diff --git a/apps/backend/app/core/config.py b/apps/backend/app/core/config.py
index 6733b3a..e374709 100644
--- a/apps/backend/app/core/config.py
+++ b/apps/backend/app/core/config.py
@@ -54,6 +54,19 @@ class Settings(BaseSettings):
     login_max_failures_per_ip: int = Field(default=20, ge=1)
     login_max_failures_per_identifier: int = Field(default=50, ge=1)
 
+    password_reset_ttl_seconds: int = Field(default=900, ge=60, le=3600)
+    password_reset_window_seconds: int = Field(default=900, ge=60)
+    password_reset_max_requests_per_identifier: int = Field(default=3, ge=1)
+    password_reset_max_requests_per_ip: int = Field(default=10, ge=1)
+
+    smtp_host: str = "localhost"
+    smtp_port: int = Field(default=587, ge=1, le=65535)
+    smtp_username: str | None = None
+    smtp_password: SecretStr | None = None
+    smtp_use_tls: bool = False
+    smtp_from_address: str = "no-reply@enervision.fr"
+    frontend_reset_password_url: str = "http://localhost:4200/reset-password"  # noqa: S105
+
     trust_proxy_headers: bool = False
     expose_api_docs: bool | None = None
     metrics_token: SecretStr | None = None
diff --git a/apps/backend/app/core/mailer.py b/apps/backend/app/core/mailer.py
new file mode 100644
index 0000000..5c09008
--- /dev/null
+++ b/apps/backend/app/core/mailer.py
@@ -0,0 +1,48 @@
+# Piège : l'URL de réinitialisation porte le jeton en clair. Ne jamais la journaliser :
+# `send_password_reset_email()` ne logue que le destinataire, jamais `reset_url`.
+
+from dataclasses import dataclass
+from email.message import EmailMessage
+
+import aiosmtplib
+
+from app.core.logging import get_logger
+
+logger = get_logger(__name__)
+
+
+@dataclass(frozen=True, slots=True)
+class SmtpConfig:
+    host: str
+    port: int
+    username: str | None
+    password: str | None
+    use_tls: bool
+    from_address: str
+
+
+class Mailer:
+    def __init__(self, config: SmtpConfig) -> None:
+        self._config = config
+
+    async def send_password_reset_email(self, *, to: str, reset_url: str) -> None:
+        message = EmailMessage()
+        message["From"] = self._config.from_address
+        message["To"] = to
+        message["Subject"] = "Réinitialisation de votre mot de passe EnerVision"
+        message.set_content(
+            "Une réinitialisation de mot de passe a été demandée pour ce compte.\n\n"
+            f"Ouvrez ce lien dans les 15 minutes pour choisir un nouveau mot de passe : "
+            f"{reset_url}\n\n"
+            "Si vous n'êtes pas à l'origine de cette demande, ignorez cet email."
+        )
+
+        _, message_recu = await aiosmtplib.send(
+            message,
+            hostname=self._config.host,
+            port=self._config.port,
+            username=self._config.username,
+            password=self._config.password,
+            use_tls=self._config.use_tls,
+        )
+        logger.info("mailer.password_reset_sent to=%s smtp_response=%s", to, message_recu)
diff --git a/apps/backend/app/models/__init__.py b/apps/backend/app/models/__init__.py
index 10a5ecb..167d7ce 100644
--- a/apps/backend/app/models/__init__.py
+++ b/apps/backend/app/models/__init__.py
@@ -4,6 +4,8 @@
 from app.models.audit_log import AuditLog
 from app.models.energy import Alert, Dataset, Prediction, Reading, Recommendation, Site
 from app.models.login_attempt import LoginAttempt
+from app.models.password_reset_attempt import PasswordResetAttempt
+from app.models.password_reset_token import PasswordResetToken
 from app.models.refresh_token import RefreshToken
 from app.models.user import AppUser
 
@@ -13,6 +15,8 @@ __all__ = [
     "AuditLog",
     "Dataset",
     "LoginAttempt",
+    "PasswordResetAttempt",
+    "PasswordResetToken",
     "Prediction",
     "Reading",
     "Recommendation",
diff --git a/apps/backend/app/models/audit_log.py b/apps/backend/app/models/audit_log.py
index 5775f5e..d389880 100644
--- a/apps/backend/app/models/audit_log.py
+++ b/apps/backend/app/models/audit_log.py
@@ -29,6 +29,8 @@ class AuditAction(StrEnum):
     COMPTE_ACTIVE = "user.enabled"
     COMPTE_MOT_DE_PASSE_REINITIALISE = "user.password_reset_by_admin"
     COMPTE_MOT_DE_PASSE_CHANGE = "user.password_changed"
+    MOT_DE_PASSE_OUBLIE_DEMANDE = "auth.password_reset_requested"
+    MOT_DE_PASSE_REINITIALISE_PAR_SOI = "auth.password_reset_self_service"
     REFRESH_REUTILISE = "auth.refresh_reuse_detected"
     SESSIONS_REVOQUEES = "auth.all_sessions_revoked"
     LIMITE_PAR_IDENTIFIANT = "auth.identifier_throttled"
diff --git a/apps/backend/app/models/password_reset_attempt.py b/apps/backend/app/models/password_reset_attempt.py
new file mode 100644
index 0000000..6d2a607
--- /dev/null
+++ b/apps/backend/app/models/password_reset_attempt.py
@@ -0,0 +1,27 @@
+# Pourquoi : même séparation que `login_attempt` par rapport à `audit_log` : ce compteur est
+# piloté par l'attaquant (une campagne de demandes) et se purge, l'audit log est en ajout seul.
+# Piège : la tentative est enregistrée même quand l'email est inconnu, sinon le 429 apprendrait
+# qu'un compte existe.
+
+from datetime import datetime
+
+from sqlalchemy import BigInteger, DateTime, Identity, Index, String, func
+from sqlalchemy.dialects.postgresql import INET
+from sqlalchemy.orm import Mapped, mapped_column
+
+from app.db.base import Base
+
+
+class PasswordResetAttempt(Base):
+    __tablename__ = "password_reset_attempt"
+    __table_args__ = (
+        Index("ix_password_reset_attempt_email_date", "email_tried", "occurred_at"),
+        Index("ix_password_reset_attempt_ip_date", "client_ip", "occurred_at"),
+    )
+
+    id: Mapped[int] = mapped_column(BigInteger, Identity(always=True), primary_key=True)
+    occurred_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True), nullable=False, server_default=func.now()
+    )
+    email_tried: Mapped[str] = mapped_column(String(320), nullable=False)
+    client_ip: Mapped[str | None] = mapped_column(INET, nullable=True)
diff --git a/apps/backend/app/models/password_reset_token.py b/apps/backend/app/models/password_reset_token.py
new file mode 100644
index 0000000..d67d310
--- /dev/null
+++ b/apps/backend/app/models/password_reset_token.py
@@ -0,0 +1,40 @@
+# Pourquoi : même schéma que `refresh_token` (chaîne opaque, jamais un JWT) pour la même
+# raison : un jeton de réinitialisation doit être révocable d'un coup, et un JWT ne figure
+# dans aucune ligne à invalider.
+
+import uuid
+from datetime import datetime
+
+from sqlalchemy import DateTime, ForeignKey, Index, LargeBinary, Text, func
+from sqlalchemy.dialects.postgresql import INET
+from sqlalchemy.dialects.postgresql import UUID as PG_UUID
+from sqlalchemy.orm import Mapped, mapped_column
+
+from app.db.base import Base
+
+
+class PasswordResetToken(Base):
+    __tablename__ = "password_reset_token"
+    __table_args__ = (
+        Index("ix_password_reset_token_user", "user_id"),
+        Index(
+            "ix_password_reset_token_vivants",
+            "user_id",
+            postgresql_where="consumed_at is null",
+        ),
+    )
+
+    id: Mapped[uuid.UUID] = mapped_column(
+        PG_UUID(as_uuid=True), primary_key=True, server_default=func.gen_random_uuid()
+    )
+    user_id: Mapped[uuid.UUID] = mapped_column(
+        PG_UUID(as_uuid=True), ForeignKey("app_user.id", ondelete="CASCADE"), nullable=False
+    )
+    token_hash: Mapped[bytes] = mapped_column(LargeBinary, nullable=False, unique=True)
+    issued_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True), nullable=False, server_default=func.now()
+    )
+    expires_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False)
+    consumed_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
+    client_ip: Mapped[str | None] = mapped_column(INET, nullable=True)
+    user_agent: Mapped[str | None] = mapped_column(Text, nullable=True)
diff --git a/apps/backend/app/repositories/password_reset_attempt.py b/apps/backend/app/repositories/password_reset_attempt.py
new file mode 100644
index 0000000..ddc2f91
--- /dev/null
+++ b/apps/backend/app/repositories/password_reset_attempt.py
@@ -0,0 +1,42 @@
+from dataclasses import dataclass
+from datetime import UTC, datetime, timedelta
+
+from sqlalchemy import func, select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.models.password_reset_attempt import PasswordResetAttempt
+
+
+@dataclass(frozen=True, slots=True)
+class ResetRequestCounts:
+    per_identifier: int
+    per_ip: int
+
+
+class PasswordResetAttemptRepository:
+    def __init__(self, session: AsyncSession) -> None:
+        self._session = session
+
+    async def record(self, *, email: str, client_ip: str | None) -> None:
+        self._session.add(
+            PasswordResetAttempt(email_tried=email.strip().lower(), client_ip=client_ip)
+        )
+
+    async def count_recent(
+        self, *, email: str, client_ip: str | None, window_seconds: int
+    ) -> ResetRequestCounts:
+        identifiant = email.strip().lower()
+        meme_email = PasswordResetAttempt.email_tried == identifiant
+        meme_ip = PasswordResetAttempt.client_ip == client_ip
+
+        requete = select(
+            func.count().filter(meme_email),
+            func.count().filter(meme_ip),
+        ).where(
+            PasswordResetAttempt.occurred_at
+            > datetime.now(UTC) - timedelta(seconds=window_seconds),
+            meme_email | meme_ip,
+        )
+
+        par_identifiant, par_ip = (await self._session.execute(requete)).one()
+        return ResetRequestCounts(per_identifier=par_identifiant, per_ip=par_ip)
diff --git a/apps/backend/app/repositories/password_reset_token.py b/apps/backend/app/repositories/password_reset_token.py
new file mode 100644
index 0000000..67eafbd
--- /dev/null
+++ b/apps/backend/app/repositories/password_reset_token.py
@@ -0,0 +1,78 @@
+# Piège : `consume()` est une seule instruction, sur le modèle de `claim_for_rotation()` du
+# jeton de rafraîchissement. Un SELECT puis un UPDATE laisseraient une fenêtre où deux
+# soumissions concurrentes du même lien réussiraient toutes les deux.
+
+from dataclasses import dataclass
+from datetime import datetime
+from uuid import UUID
+
+from sqlalchemy import func, select, update
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.models.password_reset_token import PasswordResetToken
+
+
+@dataclass(frozen=True, slots=True)
+class ConsumedResetToken:
+    id: UUID
+    user_id: UUID
+
+
+class PasswordResetTokenRepository:
+    def __init__(self, session: AsyncSession) -> None:
+        self._session = session
+
+    async def create(
+        self,
+        *,
+        user_id: UUID,
+        token_hash: bytes,
+        expires_at: datetime,
+        client_ip: str | None,
+        user_agent: str | None,
+    ) -> PasswordResetToken:
+        jeton = PasswordResetToken(
+            user_id=user_id,
+            token_hash=token_hash,
+            expires_at=expires_at,
+            client_ip=client_ip,
+            user_agent=user_agent,
+        )
+        self._session.add(jeton)
+        await self._session.flush()
+        return jeton
+
+    async def consume(self, token_hash: bytes) -> ConsumedResetToken | None:
+        requete = (
+            update(PasswordResetToken)
+            .where(
+                PasswordResetToken.token_hash == token_hash,
+                PasswordResetToken.consumed_at.is_(None),
+                PasswordResetToken.expires_at > func.clock_timestamp(),
+            )
+            .values(consumed_at=func.clock_timestamp())
+            .returning(PasswordResetToken.id, PasswordResetToken.user_id)
+        )
+        ligne = (await self._session.execute(requete)).one_or_none()
+        if ligne is None:
+            return None
+        return ConsumedResetToken(id=ligne.id, user_id=ligne.user_id)
+
+    # Piège : simple SELECT, volontairement pas atomique avec la consommation. Sert seulement
+    # au feedback UX (jeton encore valide ?) ; `consume()` reste la seule source de vérité.
+    async def exists_valid(self, token_hash: bytes) -> bool:
+        requete = select(PasswordResetToken.id).where(
+            PasswordResetToken.token_hash == token_hash,
+            PasswordResetToken.consumed_at.is_(None),
+            PasswordResetToken.expires_at > func.clock_timestamp(),
+        )
+        return (await self._session.execute(requete)).first() is not None
+
+    async def invalidate_all_for_user(self, user_id: UUID) -> int:
+        resultat = await self._session.execute(
+            update(PasswordResetToken)
+            .where(PasswordResetToken.user_id == user_id, PasswordResetToken.consumed_at.is_(None))
+            .values(consumed_at=func.clock_timestamp())
+            .returning(PasswordResetToken.id)
+        )
+        return len(resultat.all())
diff --git a/apps/backend/app/schemas/auth.py b/apps/backend/app/schemas/auth.py
index 522b4c5..f345ab7 100644
--- a/apps/backend/app/schemas/auth.py
+++ b/apps/backend/app/schemas/auth.py
@@ -1,17 +1,45 @@
 # Contrainte : le mot de passe est borné à 128 caractères. Sans plafond, une chaîne de dix
 # mégaoctets ferait travailler Argon2 gratuitement, à la charge du serveur.
+# Contrainte : `SPECIAL_CHARACTERS` doit rester identique à `password.validator.ts` côté
+# frontend. `\w`/`\d` divergent entre Python (Unicode) et JavaScript (ASCII) : une classe
+# explicite, plutôt qu'une négation, évite qu'un mot de passe soit accepté d'un côté et
+# rejeté de l'autre (ex. "Sécurité1", où "é" comptait comme "spécial" pour Python seul).
 
+import re
 from typing import Literal, Self
 from uuid import UUID
 
-from pydantic import BaseModel, ConfigDict, EmailStr, Field
+from pydantic import BaseModel, ConfigDict, EmailStr, Field, field_validator
 
 from app.core.principal import Principal
 from app.core.roles import AccountKind, Role
 
-PASSWORD_MIN_LENGTH = 12
+PASSWORD_MIN_LENGTH = 8
 PASSWORD_MAX_LENGTH = 128
 
+SPECIAL_CHARACTERS = "!@#$%^&*()-_=+[]{};:,.?"
+
+_MAJUSCULE = re.compile(r"[A-ZÀ-ÖØ-Þ]")
+_MINUSCULE = re.compile(r"[a-zà-öø-þ]")
+_CHIFFRE = re.compile(r"[0-9]")
+_SPECIAL = re.compile(r"[" + re.escape(SPECIAL_CHARACTERS) + r"]")
+
+
+def valide_complexite(mot_de_passe: str) -> str:
+    manquants = [
+        nom
+        for nom, motif in (
+            ("une majuscule", _MAJUSCULE),
+            ("une minuscule", _MINUSCULE),
+            ("un chiffre", _CHIFFRE),
+            ("un caractère spécial", _SPECIAL),
+        )
+        if not motif.search(mot_de_passe)
+    ]
+    if manquants:
+        raise ValueError(f"Le mot de passe doit contenir au moins {', '.join(manquants)}")
+    return mot_de_passe
+
 
 class LoginRequest(BaseModel):
     email: EmailStr
@@ -22,6 +50,25 @@ class PasswordChangeRequest(BaseModel):
     current_password: str = Field(min_length=1, max_length=PASSWORD_MAX_LENGTH)
     new_password: str = Field(min_length=PASSWORD_MIN_LENGTH, max_length=PASSWORD_MAX_LENGTH)
 
+    @field_validator("new_password")
+    @classmethod
+    def _new_password_est_complexe(cls, valeur: str) -> str:
+        return valide_complexite(valeur)
+
+
+class ForgotPasswordRequest(BaseModel):
+    email: EmailStr
+
+
+class ResetPasswordRequest(BaseModel):
+    token: str = Field(min_length=1)
+    new_password: str = Field(min_length=PASSWORD_MIN_LENGTH, max_length=PASSWORD_MAX_LENGTH)
+
+    @field_validator("new_password")
+    @classmethod
+    def _new_password_est_complexe(cls, valeur: str) -> str:
+        return valide_complexite(valeur)
+
 
 class PrincipalResponse(BaseModel):
     model_config = ConfigDict(from_attributes=True)
@@ -37,6 +84,10 @@ class PrincipalResponse(BaseModel):
         return cls.model_validate(principal)
 
 
+class ResetTokenValidationResponse(BaseModel):
+    valid: bool
+
+
 class TokenResponse(BaseModel):
     access_token: str
     token_type: Literal["bearer"] = "bearer"  # noqa: S105
diff --git a/apps/backend/app/services/auth.py b/apps/backend/app/services/auth.py
index 8baf857..9fac1e1 100644
--- a/apps/backend/app/services/auth.py
+++ b/apps/backend/app/services/auth.py
@@ -14,7 +14,11 @@ from datetime import UTC, datetime, timedelta
 from typing import NoReturn, Protocol
 from uuid import UUID, uuid4
 
+from fastapi import BackgroundTasks
+
 from app.core.hashing import Argon2Hasher
+from app.core.logging import get_logger
+from app.core.mailer import Mailer
 from app.core.principal import Principal
 from app.core.roles import AccountKind, Role
 from app.core.security import (
@@ -28,9 +32,13 @@ from app.models.login_attempt import LoginOutcome
 from app.models.refresh_token import RevocationReason
 from app.repositories.audit_log import AuditLogRepository
 from app.repositories.login_attempt import LoginAttemptRepository
+from app.repositories.password_reset_attempt import PasswordResetAttemptRepository
+from app.repositories.password_reset_token import PasswordResetTokenRepository
 from app.repositories.refresh_token import RefreshTokenRepository
 from app.repositories.user import UserRepository
 
+logger = get_logger(__name__)
+
 
 class Transaction(Protocol):
     async def commit(self) -> None: ...
@@ -54,6 +62,10 @@ class RateLimitedError(AuthError):
         self.retry_after = retry_after
 
 
+class InvalidOrExpiredResetTokenError(AuthError):
+    pass
+
+
 @dataclass(frozen=True, slots=True)
 class LoginPolicy:
     window_seconds: int
@@ -62,6 +74,15 @@ class LoginPolicy:
     max_failures_per_identifier: int
 
 
+@dataclass(frozen=True, slots=True)
+class PasswordResetPolicy:
+    window_seconds: int
+    max_requests_per_identifier: int
+    max_requests_per_ip: int
+    token_ttl: timedelta
+    frontend_reset_url: str
+
+
 @dataclass(frozen=True, slots=True)
 class AuthenticatedSession:
     principal: Principal
@@ -83,6 +104,10 @@ class AuthService:
         token_policy: TokenPolicy,
         login_policy: LoginPolicy,
         refresh_ttl: timedelta,
+        reset_tokens: PasswordResetTokenRepository,
+        reset_attempts: PasswordResetAttemptRepository,
+        reset_policy: PasswordResetPolicy,
+        mailer: Mailer,
     ) -> None:
         self._users = users
         self._attempts = attempts
@@ -93,6 +118,10 @@ class AuthService:
         self._token_policy = token_policy
         self._login_policy = login_policy
         self._refresh_ttl = refresh_ttl
+        self._reset_tokens = reset_tokens
+        self._reset_attempts = reset_attempts
+        self._reset_policy = reset_policy
+        self._mailer = mailer
 
     async def authenticate(
         self, *, email: str, password: str, client_ip: str | None, user_agent: str | None
@@ -200,6 +229,102 @@ class AuthService:
         rafraichi = await self._users.get_by_id(principal.id)
         return self._session(self._en_principal(rafraichi or compte), secret)
 
+    async def request_password_reset(
+        self,
+        *,
+        email: str,
+        client_ip: str | None,
+        user_agent: str | None,
+        background_tasks: BackgroundTasks,
+    ) -> None:
+        await self._refuse_si_limite_reset(email=email, client_ip=client_ip)
+
+        compte = await self._users.get_by_email(email)
+        # Piège : le hachage factice équilibre le temps de réponse sur un compte inconnu, comme
+        # `authenticate()`. La réponse et sa forme restent identiques dans tous les cas : compte
+        # inconnu, compte inactif, ou email envoyé avec succès. L'envoi SMTP lui-même est différé
+        # en tâche de fond : le laisser dans le chemin de réponse rouvrirait le même oracle par le
+        # temps (aller-retour réseau) et par la forme (500 si le relais SMTP échoue, contre 202).
+        if compte is None or not compte.is_active or compte.kind != AccountKind.HUMAIN.value:
+            await self._hasher.verify_dummy()
+            await self._reset_attempts.record(email=email, client_ip=client_ip)
+            await self._transaction.commit()
+            return
+
+        await self._reset_tokens.invalidate_all_for_user(compte.id)
+        secret = generate_refresh_secret()
+        await self._reset_tokens.create(
+            user_id=compte.id,
+            token_hash=fingerprint_refresh(secret),
+            expires_at=datetime.now(UTC) + self._reset_policy.token_ttl,
+            client_ip=client_ip,
+            user_agent=user_agent,
+        )
+        await self._reset_attempts.record(email=email, client_ip=client_ip)
+        await self._audit.record(
+            action=AuditAction.MOT_DE_PASSE_OUBLIE_DEMANDE,
+            actor_label=compte.email,
+            target_type="app_user",
+            target_id=str(compte.id),
+            client_ip=client_ip,
+            user_agent=user_agent,
+        )
+        await self._transaction.commit()
+
+        lien = f"{self._reset_policy.frontend_reset_url}?token={secret}"
+        background_tasks.add_task(self._envoie_email_reset, compte.email, lien)
+
+    async def _envoie_email_reset(self, email: str, reset_url: str) -> None:
+        try:
+            await self._mailer.send_password_reset_email(to=email, reset_url=reset_url)
+        except Exception:
+            logger.exception("auth.password_reset.mail_failed")
+
+    # Piège : lecture seule, pas d'appel à `consume()`. Aucune limitation de débit n'est
+    # nécessaire ici : le jeton est un secret de 256 bits (`generate_refresh_secret`), donc
+    # non brute-forçable, et cette route n'apprend rien sur l'existence d'un compte ou d'un
+    # email, seulement si le lien déjà en main du visiteur est encore valide.
+    async def is_reset_token_valid(self, token: str) -> bool:
+        return await self._reset_tokens.exists_valid(fingerprint_refresh(token))
+
+    async def confirm_password_reset(
+        self, *, token: str, new_password: str, client_ip: str | None, user_agent: str | None
+    ) -> AuthenticatedSession:
+        revendique = await self._reset_tokens.consume(fingerprint_refresh(token))
+        if revendique is None:
+            raise InvalidOrExpiredResetTokenError("Lien invalide ou expiré")
+
+        # Piège : le jeton peut avoir été émis avant une désactivation du compte. Sans cette
+        # relecture, un lien encore valide (15 min) changerait quand même le mot de passe d'un
+        # compte désactivé, réutilisable dès sa réactivation.
+        compte = await self._users.get_by_id(revendique.user_id)
+        if compte is None or not compte.is_active or compte.kind != AccountKind.HUMAIN.value:
+            raise InvalidOrExpiredResetTokenError("Lien invalide ou expiré")
+
+        await self._users.update_password(
+            revendique.user_id, await self._hasher.hash(new_password), must_change_password=False
+        )
+        revoquees = await self._refresh.revoke_all_for_user(
+            revendique.user_id, RevocationReason.CHANGEMENT_MOT_DE_PASSE
+        )
+        secret = await self._ouvre_une_famille(
+            user_id=revendique.user_id, client_ip=client_ip, user_agent=user_agent
+        )
+        await self._audit.record(
+            action=AuditAction.MOT_DE_PASSE_REINITIALISE_PAR_SOI,
+            target_type="app_user",
+            target_id=str(revendique.user_id),
+            client_ip=client_ip,
+            user_agent=user_agent,
+            detail={"sessions_revoquees": revoquees},
+        )
+        await self._transaction.commit()
+
+        compte = await self._users.get_by_id(revendique.user_id)
+        if compte is None:
+            raise SessionRejectedError("Compte introuvable")
+        return self._session(self._en_principal(compte), secret)
+
     async def logout_all(self, principal: Principal) -> int:
         revoquees = await self._refresh.revoke_all_for_user(
             principal.id, RevocationReason.DECONNEXION
@@ -307,6 +432,23 @@ class AuthService:
         await self._transaction.commit()
         raise RateLimitedError(politique.window_seconds)
 
+    async def _refuse_si_limite_reset(self, *, email: str, client_ip: str | None) -> None:
+        politique = self._reset_policy
+        compteurs = await self._reset_attempts.count_recent(
+            email=email, client_ip=client_ip, window_seconds=politique.window_seconds
+        )
+
+        depasse = (
+            compteurs.per_identifier >= politique.max_requests_per_identifier
+            or compteurs.per_ip >= politique.max_requests_per_ip
+        )
+        if not depasse:
+            return
+
+        await self._reset_attempts.record(email=email, client_ip=client_ip)
+        await self._transaction.commit()
+        raise RateLimitedError(politique.window_seconds)
+
     async def _echoue(
         self,
         email: str,
diff --git a/apps/backend/openapi.json b/apps/backend/openapi.json
index e8525a9..3f414fa 100644
--- a/apps/backend/openapi.json
+++ b/apps/backend/openapi.json
@@ -424,6 +424,196 @@
         ]
       }
     },
+    "/api/v1/auth/forgot-password": {
+      "post": {
+        "tags": [
+          "auth"
+        ],
+        "summary": "Demande un lien de réinitialisation par email",
+        "operationId": "forgot_password_api_v1_auth_forgot_password_post",
+        "requestBody": {
+          "content": {
+            "application/json": {
+              "schema": {
+                "$ref": "#/components/schemas/ForgotPasswordRequest"
+              }
+            }
+          },
+          "required": true
+        },
+        "responses": {
+          "202": {
+            "description": "Successful Response",
+            "content": {
+              "application/json": {
+                "schema": {}
+              }
+            }
+          },
+          "500": {
+            "description": "Erreur interne. `correlation` identifie la trace côté serveur, qui n'est pas renvoyée au client.",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/InternalErrorResponse"
+                }
+              }
+            }
+          },
+          "422": {
+            "description": "Corps invalide. Le détail nomme le champ fautif et le type d'erreur, jamais la valeur envoyée.",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/ValidationErrorResponse"
+                }
+              }
+            }
+          },
+          "429": {
+            "description": "Trop de demandes sur cette fenêtre glissante.",
+            "headers": {
+              "Retry-After": {
+                "description": "Secondes à attendre avant une nouvelle tentative.",
+                "schema": {
+                  "type": "integer"
+                }
+              }
+            },
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/ErrorResponse"
+                }
+              }
+            }
+          }
+        }
+      }
+    },
+    "/api/v1/auth/reset-password/validate": {
+      "get": {
+        "tags": [
+          "auth"
+        ],
+        "summary": "Vérifie sans le consommer si un lien de réinitialisation est encore valide",
+        "operationId": "validate_reset_token_api_v1_auth_reset_password_validate_get",
+        "parameters": [
+          {
+            "name": "token",
+            "in": "query",
+            "required": true,
+            "schema": {
+              "type": "string",
+              "title": "Token"
+            }
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "Successful Response",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/ResetTokenValidationResponse"
+                }
+              }
+            }
+          },
+          "500": {
+            "description": "Erreur interne. `correlation` identifie la trace côté serveur, qui n'est pas renvoyée au client.",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/InternalErrorResponse"
+                }
+              }
+            }
+          },
+          "422": {
+            "description": "Corps invalide. Le détail nomme le champ fautif et le type d'erreur, jamais la valeur envoyée.",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/ValidationErrorResponse"
+                }
+              }
+            }
+          }
+        }
+      }
+    },
+    "/api/v1/auth/reset-password": {
+      "post": {
+        "tags": [
+          "auth"
+        ],
+        "summary": "Choisit un nouveau mot de passe depuis un lien reçu par email",
+        "operationId": "reset_password_api_v1_auth_reset_password_post",
+        "requestBody": {
+          "content": {
+            "application/json": {
+              "schema": {
+                "$ref": "#/components/schemas/ResetPasswordRequest"
+              }
+            }
+          },
+          "required": true
+        },
+        "responses": {
+          "200": {
+            "description": "Successful Response",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/TokenResponse"
+                }
+              }
+            }
+          },
+          "500": {
+            "description": "Erreur interne. `correlation` identifie la trace côté serveur, qui n'est pas renvoyée au client.",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/InternalErrorResponse"
+                }
+              }
+            }
+          },
+          "422": {
+            "description": "Corps invalide. Le détail nomme le champ fautif et le type d'erreur, jamais la valeur envoyée.",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/ValidationErrorResponse"
+                }
+              }
+            }
+          },
+          "403": {
+            "description": "Origine non autorisée (protection CSRF de `require_trusted_origin`).",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/ErrorResponse"
+                }
+              }
+            }
+          },
+          "400": {
+            "description": "Lien invalide, déjà utilisé, ou expiré (durée de vie : 15 minutes).",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/ErrorResponse"
+                }
+              }
+            }
+          }
+        }
+      }
+    },
     "/api/v1/users": {
       "get": {
         "tags": [
@@ -1587,6 +1777,20 @@
         ],
         "title": "FieldError"
       },
+      "ForgotPasswordRequest": {
+        "properties": {
+          "email": {
+            "type": "string",
+            "format": "email",
+            "title": "Email"
+          }
+        },
+        "type": "object",
+        "required": [
+          "email"
+        ],
+        "title": "ForgotPasswordRequest"
+      },
       "InternalErrorResponse": {
         "properties": {
           "detail": {
@@ -1666,7 +1870,7 @@
           "new_password": {
             "type": "string",
             "maxLength": 128,
-            "minLength": 12,
+            "minLength": 8,
             "title": "New Password"
           }
         },
@@ -1993,6 +2197,40 @@
         ],
         "title": "RecommendationResponse"
       },
+      "ResetPasswordRequest": {
+        "properties": {
+          "token": {
+            "type": "string",
+            "minLength": 1,
+            "title": "Token"
+          },
+          "new_password": {
+            "type": "string",
+            "maxLength": 128,
+            "minLength": 8,
+            "title": "New Password"
+          }
+        },
+        "type": "object",
+        "required": [
+          "token",
+          "new_password"
+        ],
+        "title": "ResetPasswordRequest"
+      },
+      "ResetTokenValidationResponse": {
+        "properties": {
+          "valid": {
+            "type": "boolean",
+            "title": "Valid"
+          }
+        },
+        "type": "object",
+        "required": [
+          "valid"
+        ],
+        "title": "ResetTokenValidationResponse"
+      },
       "Role": {
         "type": "string",
         "enum": [
diff --git a/apps/backend/pyproject.toml b/apps/backend/pyproject.toml
index c330c8d..5336ba6 100644
--- a/apps/backend/pyproject.toml
+++ b/apps/backend/pyproject.toml
@@ -16,6 +16,7 @@ dependencies = [
     "pyjwt>=2.10",
     "argon2-cffi>=23.1",
     "anyio>=4.0",
+    "aiosmtplib>=5.1.3",
     "pandas>=3.0.5",
 ]
 
diff --git a/apps/backend/tests/api/test_auth.py b/apps/backend/tests/api/test_auth.py
index 1d734da..dd8256b 100644
--- a/apps/backend/tests/api/test_auth.py
+++ b/apps/backend/tests/api/test_auth.py
@@ -11,6 +11,7 @@ from app.core.roles import AccountKind, Role
 from app.services.auth import (
     AuthenticatedSession,
     InvalidCredentialsError,
+    InvalidOrExpiredResetTokenError,
     RateLimitedError,
     SessionRejectedError,
 )
@@ -27,15 +28,27 @@ PRINCIPAL = Principal(
 
 
 class FauxService:
-    def __init__(self, erreur: Exception | None = None) -> None:
+    def __init__(self, erreur: Exception | None = None, *, jeton_valide: bool = True) -> None:
         self._erreur = erreur
+        self._jeton_valide = jeton_valide
 
     async def refresh(self, **_: object) -> AuthenticatedSession:
         return await self.authenticate()
 
+    async def is_reset_token_valid(self, **_: object) -> bool:
+        return self._jeton_valide
+
     async def logout(self, **_: object) -> None:
         return None
 
+    async def request_password_reset(self, **_: object) -> None:
+        if self._erreur is not None:
+            raise self._erreur
+        return None
+
+    async def confirm_password_reset(self, **_: object) -> AuthenticatedSession:
+        return await self.authenticate()
+
     async def authenticate(self, **_: object) -> AuthenticatedSession:
         if self._erreur is not None:
             raise self._erreur
@@ -206,3 +219,126 @@ async def test_a_cookie_bearing_route_accepts_a_request_without_origin(
     response = await client.post("/api/v1/auth/logout")
 
     assert response.status_code != 403
+
+
+async def test_forgot_password_answers_202_when_the_account_exists(
+    fake_auth_service: list[Exception | None], client: AsyncClient
+) -> None:
+    response = await client.post(
+        "/api/v1/auth/forgot-password", json={"email": "operateur@enervision.fr"}
+    )
+
+    assert response.status_code == 202
+    assert response.headers["cache-control"] == "no-store"
+
+
+async def test_forgot_password_answers_202_identically_when_the_account_is_unknown(
+    fake_auth_service: list[Exception | None], client: AsyncClient
+) -> None:
+    response = await client.post(
+        "/api/v1/auth/forgot-password", json={"email": "inconnu@enervision.fr"}
+    )
+
+    assert response.status_code == 202
+
+
+async def test_forgot_password_returns_429_with_a_retry_after_when_the_rate_limit_is_reached(
+    fake_auth_service: list[Exception | None], client: AsyncClient
+) -> None:
+    fake_auth_service[0] = RateLimitedError(900)
+
+    response = await client.post(
+        "/api/v1/auth/forgot-password", json={"email": "operateur@enervision.fr"}
+    )
+
+    assert response.status_code == 429
+    assert response.headers["retry-after"] == "900"
+
+
+async def test_forgot_password_rejects_a_malformed_email(
+    fake_auth_service: list[Exception | None], client: AsyncClient
+) -> None:
+    response = await client.post("/api/v1/auth/forgot-password", json={"email": "pas-un-email"})
+
+    assert response.status_code == 422
+
+
+@pytest.fixture
+def fake_auth_service_reset_validity(app: FastAPI) -> Iterator[list[bool]]:
+    programme = [True]
+    app.dependency_overrides[get_auth_service] = lambda: FauxService(jeton_valide=programme[0])
+    yield programme
+    app.dependency_overrides.pop(get_auth_service, None)
+
+
+async def test_validate_reset_token_reports_a_living_token(
+    fake_auth_service_reset_validity: list[bool], client: AsyncClient
+) -> None:
+    response = await client.get(
+        "/api/v1/auth/reset-password/validate", params={"token": "un-secret-opaque"}
+    )
+
+    assert response.status_code == 200
+    assert response.json() == {"valid": True}
+
+
+async def test_validate_reset_token_reports_an_invalid_or_expired_token(
+    fake_auth_service_reset_validity: list[bool], client: AsyncClient
+) -> None:
+    fake_auth_service_reset_validity[0] = False
+
+    response = await client.get(
+        "/api/v1/auth/reset-password/validate", params={"token": "un-secret-perime"}
+    )
+
+    assert response.status_code == 200
+    assert response.json() == {"valid": False}
+
+
+async def test_reset_password_returns_the_token_and_the_cookie_on_success(
+    fake_auth_service: list[Exception | None], client: AsyncClient
+) -> None:
+    response = await client.post(
+        "/api/v1/auth/reset-password",
+        json={"token": "un-secret-opaque", "new_password": "Un-nouveau-mot-de-passe1!"},
+    )
+
+    assert response.status_code == 200
+    assert response.cookies.get("ev_refresh") is not None
+    assert "refresh_secret" not in response.text
+
+
+async def test_reset_password_rejects_an_invalid_or_expired_token(
+    fake_auth_service: list[Exception | None], client: AsyncClient
+) -> None:
+    fake_auth_service[0] = InvalidOrExpiredResetTokenError("Lien invalide ou expiré")
+
+    response = await client.post(
+        "/api/v1/auth/reset-password",
+        json={"token": "un-secret-perime", "new_password": "Un-nouveau-mot-de-passe1!"},
+    )
+
+    assert response.status_code == 400
+
+
+async def test_reset_password_rejects_a_weak_password(
+    fake_auth_service: list[Exception | None], client: AsyncClient
+) -> None:
+    response = await client.post(
+        "/api/v1/auth/reset-password",
+        json={"token": "un-secret-opaque", "new_password": "trop-simple"},
+    )
+
+    assert response.status_code == 422
+
+
+async def test_reset_password_refuses_a_foreign_origin(
+    fake_auth_service: list[Exception | None], client: AsyncClient
+) -> None:
+    response = await client.post(
+        "/api/v1/auth/reset-password",
+        json={"token": "un-secret-opaque", "new_password": "Un-nouveau-mot-de-passe1!"},
+        headers={"Origin": "https://malveillant.example"},
+    )
+
+    assert response.status_code == 403
diff --git a/apps/backend/tests/api/test_route_protection.py b/apps/backend/tests/api/test_route_protection.py
index 9a04338..734c9db 100644
--- a/apps/backend/tests/api/test_route_protection.py
+++ b/apps/backend/tests/api/test_route_protection.py
@@ -18,6 +18,13 @@ ROUTES_PUBLIQUES = frozenset(
         ("POST", "/api/v1/auth/login"),
         # Sans cookie, la déconnexion ne fait rien et répond 204 : elle est idempotente.
         ("POST", "/api/v1/auth/logout"),
+        ("POST", "/api/v1/auth/forgot-password"),
+        # Protégée par le jeton dans le corps de la requête, pas par un `Principal` : aucune
+        # authentification préalable ne s'applique, c'est la validité du jeton qui tranche.
+        ("POST", "/api/v1/auth/reset-password"),
+        # Même raison : lecture seule, protégée par le jeton passé en paramètre, pas par un
+        # `Principal`. Le jeton est un secret de 256 bits, non brute-forçable.
+        ("GET", "/api/v1/auth/reset-password/validate"),
         ("GET", "/metrics"),
     }
 )
diff --git a/apps/backend/tests/repositories/test_password_reset_token.py b/apps/backend/tests/repositories/test_password_reset_token.py
new file mode 100644
index 0000000..fe99800
--- /dev/null
+++ b/apps/backend/tests/repositories/test_password_reset_token.py
@@ -0,0 +1,142 @@
+# Le premier test démontre l'atomicité de `consume()` : sur un double, deux soumissions
+# concurrentes du même lien réussiraient toutes les deux.
+
+import uuid
+from datetime import UTC, datetime, timedelta
+
+import pytest
+from sqlalchemy.exc import IntegrityError
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.core.roles import Role
+from app.core.security import fingerprint_refresh, generate_refresh_secret
+from app.repositories.password_reset_token import PasswordResetTokenRepository
+from app.repositories.user import UserRepository
+
+pytestmark = pytest.mark.integration
+
+DUREE = timedelta(minutes=15)
+
+
+async def un_compte(session: AsyncSession) -> uuid.UUID:
+    compte = await UserRepository(session).create(
+        email=f"reset-{uuid.uuid4().hex[:12]}@enervision.fr",
+        password_hash="$argon2id$x",
+        role=Role.LECTEUR,
+    )
+    return compte.id
+
+
+async def un_jeton(
+    depot: PasswordResetTokenRepository, user_id: uuid.UUID, *, duree: timedelta = DUREE
+) -> str:
+    secret = generate_refresh_secret()
+    await depot.create(
+        user_id=user_id,
+        token_hash=fingerprint_refresh(secret),
+        expires_at=datetime.now(UTC) + duree,
+        client_ip="203.0.113.10",
+        user_agent="pytest",
+    )
+    return secret
+
+
+async def test_consume_only_succeeds_once(session: AsyncSession) -> None:
+    depot = PasswordResetTokenRepository(session)
+    secret = await un_jeton(depot, await un_compte(session))
+
+    premier = await depot.consume(fingerprint_refresh(secret))
+    second = await depot.consume(fingerprint_refresh(secret))
+    await session.rollback()
+
+    assert premier is not None
+    assert second is None
+
+
+async def test_consume_refuses_an_expired_token(session: AsyncSession) -> None:
+    depot = PasswordResetTokenRepository(session)
+    secret = await un_jeton(depot, await un_compte(session), duree=-timedelta(minutes=1))
+
+    revendique = await depot.consume(fingerprint_refresh(secret))
+    await session.rollback()
+
+    assert revendique is None
+
+
+async def test_consume_returns_nothing_for_an_unknown_fingerprint(
+    session: AsyncSession,
+) -> None:
+    revendique = await PasswordResetTokenRepository(session).consume(
+        fingerprint_refresh(generate_refresh_secret())
+    )
+
+    assert revendique is None
+
+
+async def test_invalidate_all_for_user_only_touches_living_tokens(
+    session: AsyncSession,
+) -> None:
+    depot = PasswordResetTokenRepository(session)
+    compte = await un_compte(session)
+    await un_jeton(depot, compte)
+    await un_jeton(depot, compte)
+
+    invalides = await depot.invalidate_all_for_user(compte)
+    second_passage = await depot.invalidate_all_for_user(compte)
+    await session.rollback()
+
+    assert invalides == 2
+    assert second_passage == 0
+
+
+async def test_exists_valid_is_true_for_a_living_token(session: AsyncSession) -> None:
+    depot = PasswordResetTokenRepository(session)
+    secret = await un_jeton(depot, await un_compte(session))
+
+    assert await depot.exists_valid(fingerprint_refresh(secret)) is True
+
+
+async def test_exists_valid_is_false_for_an_expired_token(session: AsyncSession) -> None:
+    depot = PasswordResetTokenRepository(session)
+    secret = await un_jeton(depot, await un_compte(session), duree=-timedelta(minutes=1))
+
+    assert await depot.exists_valid(fingerprint_refresh(secret)) is False
+
+
+async def test_exists_valid_is_false_once_the_token_is_consumed(session: AsyncSession) -> None:
+    depot = PasswordResetTokenRepository(session)
+    secret = await un_jeton(depot, await un_compte(session))
+    await depot.consume(fingerprint_refresh(secret))
+
+    assert await depot.exists_valid(fingerprint_refresh(secret)) is False
+
+
+async def test_exists_valid_is_false_for_an_unknown_fingerprint(session: AsyncSession) -> None:
+    depot = PasswordResetTokenRepository(session)
+
+    assert await depot.exists_valid(fingerprint_refresh(generate_refresh_secret())) is False
+
+
+async def test_the_database_refuses_two_tokens_sharing_a_fingerprint(
+    session: AsyncSession,
+) -> None:
+    depot = PasswordResetTokenRepository(session)
+    compte = await un_compte(session)
+    secret = generate_refresh_secret()
+    await depot.create(
+        user_id=compte,
+        token_hash=fingerprint_refresh(secret),
+        expires_at=datetime.now(UTC) + DUREE,
+        client_ip=None,
+        user_agent=None,
+    )
+
+    with pytest.raises(IntegrityError):
+        await depot.create(
+            user_id=compte,
+            token_hash=fingerprint_refresh(secret),
+            expires_at=datetime.now(UTC) + DUREE,
+            client_ip=None,
+            user_agent=None,
+        )
+    await session.rollback()
diff --git a/apps/backend/tests/schemas/__init__.py b/apps/backend/tests/schemas/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/apps/backend/tests/schemas/test_auth.py b/apps/backend/tests/schemas/test_auth.py
new file mode 100644
index 0000000..956e1e4
--- /dev/null
+++ b/apps/backend/tests/schemas/test_auth.py
@@ -0,0 +1,61 @@
+import pytest
+from pydantic import ValidationError
+
+from app.schemas.auth import PasswordChangeRequest, valide_complexite
+
+MOT_DE_PASSE_VALIDE = "Un-mot-de-passe1!"
+
+
+def test_password_change_request_accepts_a_password_covering_the_four_classes() -> None:
+    requete = PasswordChangeRequest(
+        current_password="peu-importe", new_password=MOT_DE_PASSE_VALIDE
+    )
+
+    assert requete.new_password == MOT_DE_PASSE_VALIDE
+
+
+@pytest.mark.parametrize(
+    "new_password",
+    [
+        "un-mot-de-passe1!",
+        "UN-MOT-DE-PASSE1!",
+        "Un-mot-de-passe!",
+        "Un mot de passe 1",
+    ],
+    ids=["sans_majuscule", "sans_minuscule", "sans_chiffre", "sans_caractere_special"],
+)
+def test_password_change_request_rejects_a_password_missing_a_character_class(
+    new_password: str,
+) -> None:
+    with pytest.raises(ValidationError):
+        PasswordChangeRequest(current_password="peu-importe", new_password=new_password)
+
+
+def test_password_change_request_rejects_a_password_below_the_minimum_length() -> None:
+    with pytest.raises(ValidationError):
+        PasswordChangeRequest(current_password="peu-importe", new_password="Ab1!")
+
+
+def test_valide_complexite_names_every_missing_class_in_the_error() -> None:
+    with pytest.raises(ValueError, match=r"majuscule.*chiffre|chiffre.*majuscule"):
+        valide_complexite("minuscules-seulement")
+
+
+def test_valide_complexite_accepts_an_accented_password() -> None:
+    assert valide_complexite("Sécurité1!") == "Sécurité1!"
+
+
+@pytest.mark.parametrize("mot_de_passe", ["abcdefg1×", "abcdefg1÷"])  # noqa: RUF001
+def test_valide_complexite_rejects_a_password_without_uppercase_despite_times_or_divide(
+    mot_de_passe: str,
+) -> None:
+    with pytest.raises(ValueError, match="majuscule"):
+        valide_complexite(mot_de_passe)
+
+
+@pytest.mark.parametrize("mot_de_passe", ["ABCDEFG1×", "ABCDEFG1÷"])  # noqa: RUF001
+def test_valide_complexite_rejects_a_password_without_lowercase_despite_times_or_divide(
+    mot_de_passe: str,
+) -> None:
+    with pytest.raises(ValueError, match="minuscule"):
+        valide_complexite(mot_de_passe)
diff --git a/apps/backend/tests/services/test_auth.py b/apps/backend/tests/services/test_auth.py
index 9b8c42c..50a906a 100644
--- a/apps/backend/tests/services/test_auth.py
+++ b/apps/backend/tests/services/test_auth.py
@@ -5,6 +5,7 @@ from typing import Any
 from uuid import UUID, uuid4
 
 import pytest
+from fastapi import BackgroundTasks
 
 from app.core.principal import Principal
 from app.core.roles import AccountKind, Role
@@ -16,11 +17,15 @@ from app.core.security import (
 from app.models.login_attempt import LoginOutcome
 from app.models.refresh_token import RevocationReason
 from app.repositories.login_attempt import FailureCounts
+from app.repositories.password_reset_attempt import ResetRequestCounts
+from app.repositories.password_reset_token import ConsumedResetToken
 from app.repositories.refresh_token import ClaimedToken
 from app.services.auth import (
     AuthService,
     InvalidCredentialsError,
+    InvalidOrExpiredResetTokenError,
     LoginPolicy,
+    PasswordResetPolicy,
     RateLimitedError,
     SessionRejectedError,
 )
@@ -37,6 +42,13 @@ POLITIQUE_CONNEXION = LoginPolicy(
     max_failures_per_ip=20,
     max_failures_per_identifier=50,
 )
+POLITIQUE_RESET = PasswordResetPolicy(
+    window_seconds=900,
+    max_requests_per_identifier=3,
+    max_requests_per_ip=10,
+    token_ttl=timedelta(minutes=15),
+    frontend_reset_url="http://localhost:4200/reset-password",
+)
 
 
 @dataclass
@@ -168,6 +180,49 @@ class FausseTransaction:
         self.validations += 1
 
 
+class FauxDepotJetonsReset:
+    def __init__(
+        self, revendique: ConsumedResetToken | None = None, *, valide: bool = False
+    ) -> None:
+        self.revendique = revendique
+        self.valide = valide
+        self.crees: list[UUID] = []
+        self.invalidations: list[UUID] = []
+
+    async def create(self, *, user_id: UUID, **_: object) -> None:
+        self.crees.append(user_id)
+
+    async def consume(self, token_hash: bytes) -> ConsumedResetToken | None:
+        return self.revendique
+
+    async def exists_valid(self, token_hash: bytes) -> bool:
+        return self.valide
+
+    async def invalidate_all_for_user(self, user_id: UUID) -> int:
+        self.invalidations.append(user_id)
+        return len(self.invalidations)
+
+
+class FauxDepotTentativesReset:
+    def __init__(self, compteurs: ResetRequestCounts | None = None) -> None:
+        self.compteurs = compteurs or ResetRequestCounts(0, 0)
+        self.enregistrees: list[str] = []
+
+    async def count_recent(self, **_: object) -> ResetRequestCounts:
+        return self.compteurs
+
+    async def record(self, *, email: str, **_: object) -> None:
+        self.enregistrees.append(email)
+
+
+class FauxMailer:
+    def __init__(self) -> None:
+        self.envois: list[tuple[str, str]] = []
+
+    async def send_password_reset_email(self, *, to: str, reset_url: str) -> None:
+        self.envois.append((to, reset_url))
+
+
 @dataclass
 class Attirail:
     service: AuthService
@@ -176,6 +231,9 @@ class Attirail:
     jetons: FauxDepotJetons
     audit: FauxDepotAudit
     hacheur: FauxHacheur
+    jetons_reset: FauxDepotJetonsReset
+    tentatives_reset: FauxDepotTentativesReset
+    mailer: FauxMailer
 
 
 def fabrique_service(
@@ -184,12 +242,17 @@ def fabrique_service(
     compteurs: FailureCounts | None = None,
     hacheur: FauxHacheur | None = None,
     jetons: FauxDepotJetons | None = None,
+    jetons_reset: FauxDepotJetonsReset | None = None,
+    compteurs_reset: ResetRequestCounts | None = None,
 ) -> Attirail:
     comptes = FauxDepotComptes(compte)
     tentatives = FauxDepotTentatives(compteurs)
     depot_jetons = jetons or FauxDepotJetons()
     audit = FauxDepotAudit()
     hacheur = hacheur or FauxHacheur()
+    depot_jetons_reset = jetons_reset or FauxDepotJetonsReset()
+    tentatives_reset = FauxDepotTentativesReset(compteurs_reset)
+    mailer = FauxMailer()
     service = AuthService(
         users=comptes,  # type: ignore[arg-type]
         attempts=tentatives,  # type: ignore[arg-type]
@@ -200,8 +263,22 @@ def fabrique_service(
         token_policy=POLITIQUE_JETON,
         login_policy=POLITIQUE_CONNEXION,
         refresh_ttl=timedelta(days=7),
+        reset_tokens=depot_jetons_reset,  # type: ignore[arg-type]
+        reset_attempts=tentatives_reset,  # type: ignore[arg-type]
+        reset_policy=POLITIQUE_RESET,
+        mailer=mailer,  # type: ignore[arg-type]
+    )
+    return Attirail(
+        service,
+        comptes,
+        tentatives,
+        depot_jetons,
+        audit,
+        hacheur,
+        depot_jetons_reset,
+        tentatives_reset,
+        mailer,
     )
-    return Attirail(service, comptes, tentatives, depot_jetons, audit, hacheur)
 
 
 async def connecte(service: AuthService, mot_de_passe: str = "un-mot-de-passe-valide") -> object:
@@ -493,3 +570,148 @@ async def test_change_password_refuses_a_wrong_current_password() -> None:
 
     assert attirail.jetons.revocations_par_compte == []
     assert attirail.jetons.crees == []
+
+
+async def test_request_password_reset_emails_a_link_when_the_account_exists() -> None:
+    compte = FauxCompte()
+    attirail = fabrique_service(compte=compte)
+    taches = BackgroundTasks()
+
+    await attirail.service.request_password_reset(
+        email=compte.email, client_ip="203.0.113.10", user_agent="pytest", background_tasks=taches
+    )
+
+    assert attirail.jetons_reset.invalidations == [compte.id]
+    assert attirail.jetons_reset.crees == [compte.id]
+    assert attirail.mailer.envois == [], "l'envoi doit être différé, pas fait dans la réponse"
+    await taches()
+    assert len(attirail.mailer.envois) == 1
+    assert attirail.mailer.envois[0][0] == compte.email
+    assert "auth.password_reset_requested" in attirail.audit.lignes[0][0]
+
+
+async def test_request_password_reset_stays_silent_when_the_account_is_unknown() -> None:
+    attirail = fabrique_service(compte=None)
+    taches = BackgroundTasks()
+
+    await attirail.service.request_password_reset(
+        email="inconnu@enervision.fr",
+        client_ip="203.0.113.10",
+        user_agent="pytest",
+        background_tasks=taches,
+    )
+    await taches()
+
+    assert attirail.jetons_reset.crees == []
+    assert attirail.mailer.envois == []
+    assert attirail.hacheur.verifications == 1, "le hachage factice doit tout de même tourner"
+
+
+async def test_request_password_reset_stays_silent_when_the_account_is_inactive() -> None:
+    compte = FauxCompte(is_active=False)
+    attirail = fabrique_service(compte=compte)
+    taches = BackgroundTasks()
+
+    await attirail.service.request_password_reset(
+        email=compte.email, client_ip="203.0.113.10", user_agent="pytest", background_tasks=taches
+    )
+    await taches()
+
+    assert attirail.jetons_reset.crees == []
+    assert attirail.mailer.envois == []
+
+
+async def test_request_password_reset_raises_when_the_rate_limit_is_reached() -> None:
+    attirail = fabrique_service(compteurs_reset=ResetRequestCounts(per_identifier=3, per_ip=0))
+    taches = BackgroundTasks()
+
+    with pytest.raises(RateLimitedError):
+        await attirail.service.request_password_reset(
+            email="operateur@enervision.fr",
+            client_ip="203.0.113.10",
+            user_agent="pytest",
+            background_tasks=taches,
+        )
+
+    await taches()
+    assert attirail.mailer.envois == []
+
+
+async def test_request_password_reset_logs_instead_of_raising_when_the_mailer_fails() -> None:
+    compte = FauxCompte()
+    attirail = fabrique_service(compte=compte)
+    taches = BackgroundTasks()
+
+    async def echoue(*, to: str, reset_url: str) -> None:
+        raise RuntimeError("relais SMTP indisponible")
+
+    attirail.mailer.send_password_reset_email = echoue  # type: ignore[method-assign]
+
+    await attirail.service.request_password_reset(
+        email=compte.email, client_ip="203.0.113.10", user_agent="pytest", background_tasks=taches
+    )
+
+    await taches()
+
+
+async def test_confirm_password_reset_revokes_every_session_then_reopens_the_current_one() -> None:
+    compte = FauxCompte()
+    jetons_reset = FauxDepotJetonsReset(
+        revendique=ConsumedResetToken(id=uuid4(), user_id=compte.id)
+    )
+    attirail = fabrique_service(compte=compte, jetons_reset=jetons_reset)
+
+    session = await attirail.service.confirm_password_reset(
+        token="un-secret-opaque",
+        new_password="Un-nouveau-mot-de-passe1!",
+        client_ip="203.0.113.10",
+        user_agent="pytest",
+    )
+
+    assert attirail.jetons.revocations_par_compte == [
+        (compte.id, RevocationReason.CHANGEMENT_MOT_DE_PASSE.value)
+    ]
+    assert len(attirail.jetons.crees) == 1
+    assert session.refresh_secret
+    assert "auth.password_reset_self_service" in attirail.audit.lignes[0][0]
+
+
+async def test_is_reset_token_valid_reflects_the_repository() -> None:
+    attirail_valide = fabrique_service(jetons_reset=FauxDepotJetonsReset(valide=True))
+    attirail_invalide = fabrique_service(jetons_reset=FauxDepotJetonsReset(valide=False))
+
+    assert await attirail_valide.service.is_reset_token_valid("un-secret-opaque") is True
+    assert await attirail_invalide.service.is_reset_token_valid("un-secret-opaque") is False
+
+
+async def test_confirm_password_reset_rejects_a_token_for_an_account_disabled_since() -> None:
+    compte = FauxCompte(is_active=False)
+    jetons_reset = FauxDepotJetonsReset(
+        revendique=ConsumedResetToken(id=uuid4(), user_id=compte.id)
+    )
+    attirail = fabrique_service(compte=compte, jetons_reset=jetons_reset)
+
+    with pytest.raises(InvalidOrExpiredResetTokenError):
+        await attirail.service.confirm_password_reset(
+            token="un-secret-opaque",
+            new_password="Un-nouveau-mot-de-passe1!",
+            client_ip="203.0.113.10",
+            user_agent="pytest",
+        )
+
+    assert attirail.comptes.mots_de_passe_changes == 0
+    assert attirail.jetons.revocations_par_compte == []
+
+
+async def test_confirm_password_reset_rejects_an_invalid_or_expired_token() -> None:
+    attirail = fabrique_service(jetons_reset=FauxDepotJetonsReset(revendique=None))
+
+    with pytest.raises(InvalidOrExpiredResetTokenError):
+        await attirail.service.confirm_password_reset(
+            token="un-secret-invalide",
+            new_password="Un-nouveau-mot-de-passe1!",
+            client_ip=None,
+            user_agent=None,
+        )
+
+    assert attirail.jetons.revocations_par_compte == []
diff --git a/apps/backend/tests/test_cli.py b/apps/backend/tests/test_cli.py
index 40b8317..7344bf7 100644
--- a/apps/backend/tests/test_cli.py
+++ b/apps/backend/tests/test_cli.py
@@ -4,6 +4,7 @@ from pathlib import Path
 import pytest
 
 from app import cli
+from app.schemas.auth import valide_complexite
 
 
 def test_build_parser_reads_the_create_admin_arguments() -> None:
@@ -34,26 +35,36 @@ def test_read_password_generates_a_long_secret_when_asked(
 
     assert len(mot_de_passe) >= cli.LONGUEUR_MOT_DE_PASSE_GENERE
     assert mot_de_passe in capsys.readouterr().out
+    valide_complexite(mot_de_passe)
 
 
 def test_read_password_accepts_two_matching_entries(monkeypatch: pytest.MonkeyPatch) -> None:
-    saisies = iter(["un-mot-de-passe-valide", "un-mot-de-passe-valide"])
+    saisies = iter(["Un-mot-de-passe-valide1", "Un-mot-de-passe-valide1"])
     monkeypatch.setattr(cli, "getpass", lambda _: next(saisies))
 
-    assert cli.read_password(generate=False) == "un-mot-de-passe-valide"
+    assert cli.read_password(generate=False) == "Un-mot-de-passe-valide1"
 
 
 def test_read_password_refuses_a_password_below_the_minimum_length(
     monkeypatch: pytest.MonkeyPatch,
 ) -> None:
-    monkeypatch.setattr(cli, "getpass", lambda _: "court")
+    monkeypatch.setattr(cli, "getpass", lambda _: "Court1!")
+
+    with pytest.raises(SystemExit):
+        cli.read_password(generate=False)
+
+
+def test_read_password_refuses_a_password_missing_a_character_class(
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    monkeypatch.setattr(cli, "getpass", lambda _: "un-mot-de-passe-sans-majuscule-ni-chiffre")
 
     with pytest.raises(SystemExit):
         cli.read_password(generate=False)
 
 
 def test_read_password_refuses_two_different_entries(monkeypatch: pytest.MonkeyPatch) -> None:
-    saisies = iter(["un-mot-de-passe-valide", "un-autre-mot-de-passe"])
+    saisies = iter(["Un-mot-de-passe-valide1", "Un-autre-mot-de-passe2"])
     monkeypatch.setattr(cli, "getpass", lambda _: next(saisies))
 
     with pytest.raises(SystemExit):
diff --git a/apps/backend/uv.lock b/apps/backend/uv.lock
index 6836990..59ff61b 100644
--- a/apps/backend/uv.lock
+++ b/apps/backend/uv.lock
@@ -7,6 +7,15 @@ resolution-markers = [
     "sys_platform != 'emscripten' and sys_platform != 'win32'",
 ]
 
+[[package]]
+name = "aiosmtplib"
+version = "5.1.3"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/9b/5c/9cabc5db6d607616e81ba6d8f1f231cd5a75955807a308c1090a59072d6d/aiosmtplib-5.1.3.tar.gz", hash = "sha256:ac2b418d3260ba62d9cfd0fe7359726e9dc009a4e8e8d9909fdfae332f522a7c", size = 77010, upload-time = "2026-09-08T02:11:20.532Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/9c/0a/b56ab8163d54960337fdca475d3dfd56c8badf6172e79cf2ad00d5335dc1/aiosmtplib-5.1.3-py3-none-any.whl", hash = "sha256:f7d76ce3d4995a65a178c1f11e1bd1607706b921d00cb768e7a2c7f7ef5517a8", size = 30116, upload-time = "2026-09-08T02:11:19.352Z" },
+]
+
 [[package]]
 name = "alembic"
 version = "1.20.0"
@@ -311,6 +320,7 @@ name = "enervision-backend"
 version = "0.1.0"
 source = { editable = "." }
 dependencies = [
+    { name = "aiosmtplib" },
     { name = "alembic" },
     { name = "anyio" },
     { name = "argon2-cffi" },
@@ -339,6 +349,7 @@ dev = [
 
 [package.metadata]
 requires-dist = [
+    { name = "aiosmtplib", specifier = ">=5.1.3" },
     { name = "alembic", specifier = ">=1.20.0" },
     { name = "anyio", specifier = ">=4.0" },
     { name = "argon2-cffi", specifier = ">=23.1" },
diff --git a/apps/frontend/src/app/app.routes.ts b/apps/frontend/src/app/app.routes.ts
index b3e97d8..72e20f5 100644
--- a/apps/frontend/src/app/app.routes.ts
+++ b/apps/frontend/src/app/app.routes.ts
@@ -5,6 +5,8 @@ export const routes: Routes = [
   { path: '', redirectTo: 'dashboard', pathMatch: 'full' },
   { path: 'login', loadComponent: () => import('./features/auth/login/login').then(m => m.Login) },
   { path: 'change-password', loadComponent: () => import('./features/auth/change-password/change-password').then(m => m.ChangePassword) },
+  { path: 'forgot-password', loadComponent: () => import('./features/auth/forgot-password/forgot-password').then(m => m.ForgotPassword) },
+  { path: 'reset-password', loadComponent: () => import('./features/auth/reset-password/reset-password').then(m => m.ResetPassword) },
   {
     path: 'dashboard',
     canActivate: [authGuard],
diff --git a/apps/frontend/src/app/core/interceptors/auth-interceptor.spec.ts b/apps/frontend/src/app/core/interceptors/auth-interceptor.spec.ts
index 8f74cd8..9064aaf 100644
--- a/apps/frontend/src/app/core/interceptors/auth-interceptor.spec.ts
+++ b/apps/frontend/src/app/core/interceptors/auth-interceptor.spec.ts
@@ -41,7 +41,10 @@ describe('authInterceptor', () => {
     httpMock = TestBed.inject(HttpTestingController);
   });
 
-  afterEach(() => httpMock.verify());
+  afterEach(() => {
+    httpMock.verify();
+    vi.restoreAllMocks();
+  });
 
   it('ajoute le header Authorization quand un token est disponible', () => {
     http.get('/api/v1/stats/summary').subscribe();
@@ -97,6 +100,19 @@ describe('authInterceptor', () => {
     expect(routerMock.navigate).toHaveBeenCalledWith(['/login']);
   });
 
+  it("ne redirige pas vers /login sur un 401 de /auth/refresh si on est déjà sur /reset-password", () => {
+    vi.spyOn(window, 'location', 'get').mockReturnValue({
+      pathname: '/reset-password',
+    } as Location);
+
+    http.post('/api/v1/auth/refresh', {}).subscribe({ error: () => {} });
+    const req = httpMock.expectOne('/api/v1/auth/refresh');
+    req.flush({}, { status: 401, statusText: 'Unauthorized' });
+
+    expect(authMock.clearSession).toHaveBeenCalled();
+    expect(routerMock.navigate).not.toHaveBeenCalled();
+  });
+
   it('rafraîchit puis rejoue la requête sur un 401 avec error="expired"', () => {
     authMock.refreshShared.mockReturnValue(of({ access_token: 'new-token' }));
     authMock.getAccessToken.mockReturnValueOnce('old-token').mockReturnValue('new-token');
diff --git a/apps/frontend/src/app/core/interceptors/auth-interceptor.ts b/apps/frontend/src/app/core/interceptors/auth-interceptor.ts
index 46ba124..16f3047 100644
--- a/apps/frontend/src/app/core/interceptors/auth-interceptor.ts
+++ b/apps/frontend/src/app/core/interceptors/auth-interceptor.ts
@@ -11,6 +11,16 @@ function parseAuthError(response: HttpErrorResponse): string | null {
   return match ? match[1] : null;
 }
 
+const ROUTES_INVITEES = ['/login', '/forgot-password', '/reset-password'];
+
+// Piège : le rafraîchissement de session lancé au démarrage de l'app (provideAppInitializer)
+// échoue silencieusement sans cookie valide. `window.location.pathname` (pas `router.url`,
+// pas encore fiable à ce stade) évite qu'un 401 de fond écrase la navigation vers le lien de
+// reset reçu par email.
+function surRouteInvitee(): boolean {
+  return ROUTES_INVITEES.some((chemin) => window.location.pathname.startsWith(chemin));
+}
+
 export const authInterceptor: HttpInterceptorFn = (req, next) => {
   const auth = inject(AuthService);
   const router = inject(Router);
@@ -43,7 +53,9 @@ export const authInterceptor: HttpInterceptorFn = (req, next) => {
 
       if (req.url.endsWith('/auth/refresh')) {
         auth.clearSession();
-        router.navigate(['/login']);
+        if (!surRouteInvitee()) {
+          router.navigate(['/login']);
+        }
         return throwError(() => error);
       }
 
@@ -51,7 +63,9 @@ export const authInterceptor: HttpInterceptorFn = (req, next) => {
 
       if (kind === 'invalid_token') {
         auth.clearSession();
-        router.navigate(['/login']);
+        if (!surRouteInvitee()) {
+          router.navigate(['/login']);
+        }
         return throwError(() => error);
       }
 
@@ -65,7 +79,9 @@ export const authInterceptor: HttpInterceptorFn = (req, next) => {
           }),
           catchError((refreshError) => {
             auth.clearSession();
-            router.navigate(['/login']);
+            if (!surRouteInvitee()) {
+              router.navigate(['/login']);
+            }
             return throwError(() => refreshError);
           })
         );
diff --git a/apps/frontend/src/app/core/services/auth.service.spec.ts b/apps/frontend/src/app/core/services/auth.service.spec.ts
index bff86c4..c51c8eb 100644
--- a/apps/frontend/src/app/core/services/auth.service.spec.ts
+++ b/apps/frontend/src/app/core/services/auth.service.spec.ts
@@ -83,4 +83,17 @@ describe('AuthService', () => {
 
   expect(result).toEqual(tokenResponse.principal);
 });
+
+  it('vérifie la validité du jeton de reset via GET /auth/reset-password/validate', () => {
+    let result: { valid: boolean } | undefined;
+    service.validateResetToken('un-secret-opaque').subscribe((r) => (result = r));
+
+    const req = httpMock.expectOne(
+      `${environment.apiUrl}/auth/reset-password/validate?token=un-secret-opaque`
+    );
+    expect(req.request.method).toBe('GET');
+    req.flush({ valid: true });
+
+    expect(result).toEqual({ valid: true });
+  });
 });
diff --git a/apps/frontend/src/app/core/services/auth.service.ts b/apps/frontend/src/app/core/services/auth.service.ts
index d27c1db..c2d3e9c 100644
--- a/apps/frontend/src/app/core/services/auth.service.ts
+++ b/apps/frontend/src/app/core/services/auth.service.ts
@@ -1,7 +1,14 @@
 import { Service, signal, computed, inject } from '@angular/core';
 import { HttpClient } from '@angular/common/http';
 import { Observable, tap, finalize, shareReplay } from 'rxjs';
-import { LoginRequest, PasswordChangeRequest, Principal, TokenResponse } from '../../shared/models/auth.model';
+import {
+  ForgotPasswordRequest,
+  LoginRequest,
+  PasswordChangeRequest,
+  Principal,
+  ResetPasswordRequest,
+  TokenResponse,
+} from '../../shared/models/auth.model';
 import { environment } from '../../../environments/environment';
 
 @Service()
@@ -66,4 +73,20 @@ export class AuthService {
   me(): Observable<Principal> {
     return this.http.get<Principal>(`${environment.apiUrl}/auth/me`);
   }
+
+  forgotPassword(payload: ForgotPasswordRequest): Observable<void> {
+    return this.http.post<void>(`${environment.apiUrl}/auth/forgot-password`, payload);
+  }
+
+  resetPassword(payload: ResetPasswordRequest): Observable<TokenResponse> {
+    return this.http
+      .post<TokenResponse>(`${environment.apiUrl}/auth/reset-password`, payload, { withCredentials: true })
+      .pipe(tap((response) => this.setSession(response)));
+  }
+
+  validateResetToken(token: string): Observable<{ valid: boolean }> {
+    return this.http.get<{ valid: boolean }>(`${environment.apiUrl}/auth/reset-password/validate`, {
+      params: { token },
+    });
+  }
 }
diff --git a/apps/frontend/src/app/features/auth/change-password/change-password.html b/apps/frontend/src/app/features/auth/change-password/change-password.html
index edf2146..d7b5039 100644
--- a/apps/frontend/src/app/features/auth/change-password/change-password.html
+++ b/apps/frontend/src/app/features/auth/change-password/change-password.html
@@ -18,7 +18,7 @@
       formControlName="new_password"
       autocomplete="new-password"
     />
-    <span class="auth-hint">12 à 128 caractères</span>
+    <span class="auth-hint">{{ passwordHint }}</span>
 
     @if (errorMessage()) {
       <p class="auth-error">{{ errorMessage() }}</p>
diff --git a/apps/frontend/src/app/features/auth/change-password/change-password.spec.ts b/apps/frontend/src/app/features/auth/change-password/change-password.spec.ts
index 63e1872..0e72843 100644
--- a/apps/frontend/src/app/features/auth/change-password/change-password.spec.ts
+++ b/apps/frontend/src/app/features/auth/change-password/change-password.spec.ts
@@ -32,10 +32,19 @@ describe('ChangePassword', () => {
     expect(authMock.changePassword).not.toHaveBeenCalled();
   });
 
+  it('ne soumet pas si le mot de passe ne couvre pas les 4 classes de caractères', () => {
+    const fixture = TestBed.createComponent(ChangePassword);
+    const component = fixture.componentInstance;
+    component.form.setValue({ current_password: 'old', new_password: 'longueur-suffisante-sans-majuscule-ni-chiffre' });
+
+    component.onSubmit();
+    expect(authMock.changePassword).not.toHaveBeenCalled();
+  });
+
   it('redirige vers /dashboard après un changement réussi', () => {
     const fixture = TestBed.createComponent(ChangePassword);
     const component = fixture.componentInstance;
-    component.form.setValue({ current_password: 'ancien-mot-de-passe', new_password: 'un-nouveau-mot-de-passe-valide' });
+    component.form.setValue({ current_password: 'ancien-mot-de-passe', new_password: 'Un-nouveau-mot-de-passe1!' });
 
     authMock.changePassword.mockReturnValue(of({ principal: { role: 'admin' } }));
 
@@ -46,7 +55,7 @@ describe('ChangePassword', () => {
   it("affiche un message d'erreur si le mot de passe actuel est incorrect", () => {
   const fixture = TestBed.createComponent(ChangePassword);
   const component = fixture.componentInstance;
-  component.form.setValue({ current_password: 'mauvais-mot-de-passe', new_password: 'un-nouveau-mot-de-passe-valide' });
+  component.form.setValue({ current_password: 'mauvais-mot-de-passe', new_password: 'Un-nouveau-mot-de-passe1!' });
 
   authMock.changePassword.mockReturnValue(throwError(() => new Error('401')));
 
@@ -70,7 +79,7 @@ describe('ChangePassword', () => {
   it('déclenche onSubmit via la soumission réelle du formulaire (ngSubmit)', () => {
   const fixture = TestBed.createComponent(ChangePassword);
   const component = fixture.componentInstance;
-  component.form.setValue({ current_password: 'ancien-mot-de-passe', new_password: 'un-nouveau-mot-de-passe-valide' });
+  component.form.setValue({ current_password: 'ancien-mot-de-passe', new_password: 'Un-nouveau-mot-de-passe1!' });
   fixture.detectChanges();
 
   authMock.changePassword.mockReturnValue(of({ principal: { role: 'admin' } }));
@@ -81,7 +90,7 @@ describe('ChangePassword', () => {
 
   expect(authMock.changePassword).toHaveBeenCalledWith({
     current_password: 'ancien-mot-de-passe',
-    new_password: 'un-nouveau-mot-de-passe-valide',
+    new_password: 'Un-nouveau-mot-de-passe1!',
   });
 });
 
diff --git a/apps/frontend/src/app/features/auth/change-password/change-password.ts b/apps/frontend/src/app/features/auth/change-password/change-password.ts
index 507af14..528aea0 100644
--- a/apps/frontend/src/app/features/auth/change-password/change-password.ts
+++ b/apps/frontend/src/app/features/auth/change-password/change-password.ts
@@ -2,6 +2,7 @@ import { Component, inject, signal } from '@angular/core';
 import { ReactiveFormsModule, FormBuilder, Validators } from '@angular/forms';
 import { Router } from '@angular/router';
 import { AuthService } from '../../../core/services/auth.service';
+import { passwordValidators, PASSWORD_HINT } from '../../../shared/validators/password.validator';
 
 @Component({
   selector: 'app-change-password',
@@ -17,10 +18,11 @@ export class ChangePassword {
 
   errorMessage = signal<string | null>(null);
   isLoading = signal(false);
+  passwordHint = PASSWORD_HINT;
 
   form = this.fb.nonNullable.group({
     current_password: ['', Validators.required],
-    new_password: ['', [Validators.required, Validators.minLength(12), Validators.maxLength(128)]],
+    new_password: ['', passwordValidators],
   });
 
   onSubmit(): void {
@@ -34,7 +36,7 @@ export class ChangePassword {
       },
       error: () => {
         this.isLoading.set(false);
-        this.errorMessage.set('Mot de passe actuel incorrect, ou nouveau mot de passe invalide (12 à 128 caractères).');
+        this.errorMessage.set(`Mot de passe actuel incorrect, ou nouveau mot de passe invalide (${this.passwordHint}).`);
       },
     });
   }
diff --git a/apps/frontend/src/app/features/auth/forgot-password/forgot-password.html b/apps/frontend/src/app/features/auth/forgot-password/forgot-password.html
new file mode 100644
index 0000000..2bd7ef9
--- /dev/null
+++ b/apps/frontend/src/app/features/auth/forgot-password/forgot-password.html
@@ -0,0 +1,37 @@
+<div class="auth-page">
+  <form class="auth-card" [formGroup]="form" (ngSubmit)="onSubmit()">
+    <h1>Mot de passe oublié</h1>
+    <p class="auth-subtitle">Recevez un lien de réinitialisation par email</p>
+
+    @if (submitted()) {
+      <p class="auth-success">
+        Si un compte existe pour cet email, un lien de réinitialisation vient d'être envoyé.
+        Il expire dans 15 minutes.
+      </p>
+    } @else {
+      <label for="email">Email</label>
+      <input
+        id="email"
+        type="email"
+        formControlName="email"
+        autocomplete="username"
+        placeholder="vous@enervision.fr"
+      />
+
+      @if (errorMessage()) {
+        <p class="auth-error">
+          {{ errorMessage() }}
+          @if (retryAfterSeconds(); as seconds) {
+            (réessayez dans {{ seconds }}s)
+          }
+        </p>
+      }
+
+      <button type="submit" [disabled]="form.invalid || isLoading()">
+        {{ isLoading() ? 'Envoi...' : 'Envoyer le lien' }}
+      </button>
+    }
+
+    <p class="auth-link"><a routerLink="/login">Retour à la connexion</a></p>
+  </form>
+</div>
diff --git a/apps/frontend/src/app/features/auth/forgot-password/forgot-password.scss b/apps/frontend/src/app/features/auth/forgot-password/forgot-password.scss
new file mode 100644
index 0000000..31c9efc
--- /dev/null
+++ b/apps/frontend/src/app/features/auth/forgot-password/forgot-password.scss
@@ -0,0 +1,104 @@
+:host {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  min-height: 100vh;
+  background: #f3f4f6;
+  font-family: 'Segoe UI', system-ui, sans-serif;
+}
+
+.auth-card {
+  background: #ffffff;
+  border: 1px solid #e5e7eb;
+  border-radius: 12px;
+  padding: 2.5rem;
+  width: 100%;
+  max-width: 360px;
+  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
+  display: flex;
+  flex-direction: column;
+
+  h1 {
+    margin: 0;
+    font-size: 1.5rem;
+    font-weight: 700;
+    color: #1f2937;
+  }
+
+  .auth-subtitle {
+    margin: 0.25rem 0 1.5rem;
+    color: #6b7280;
+    font-size: 0.9rem;
+    line-height: 1.4;
+  }
+
+  label {
+    font-size: 0.85rem;
+    font-weight: 600;
+    color: #374151;
+    margin-bottom: 0.35rem;
+    margin-top: 1rem;
+  }
+
+  input {
+    padding: 0.6rem 0.75rem;
+    border: 1px solid #d1d5db;
+    border-radius: 8px;
+    font-size: 0.95rem;
+
+    &:focus {
+      outline: none;
+      border-color: #3b82f6;
+      box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
+    }
+  }
+
+  button {
+    margin-top: 1.5rem;
+    padding: 0.7rem;
+    background: #3b82f6;
+    color: #fff;
+    border: none;
+    border-radius: 8px;
+    font-size: 0.95rem;
+    font-weight: 600;
+    cursor: pointer;
+
+    &:disabled {
+      background: #9ca3af;
+      cursor: not-allowed;
+    }
+
+    &:not(:disabled):hover {
+      background: #2563eb;
+    }
+  }
+}
+
+.auth-hint {
+  font-size: 0.75rem;
+  color: #9ca3af;
+  margin-top: 0.25rem;
+}
+
+.auth-error {
+  margin: 0.75rem 0 0;
+  color: #dc2626;
+  font-size: 0.85rem;
+}
+
+.auth-success {
+  margin: 0.75rem 0 0;
+  color: #16a34a;
+  font-size: 0.85rem;
+}
+
+.auth-link {
+  margin-top: 1rem;
+  font-size: 0.85rem;
+  text-align: center;
+
+  a {
+    color: #3b82f6;
+  }
+}
diff --git a/apps/frontend/src/app/features/auth/forgot-password/forgot-password.spec.ts b/apps/frontend/src/app/features/auth/forgot-password/forgot-password.spec.ts
new file mode 100644
index 0000000..56f7764
--- /dev/null
+++ b/apps/frontend/src/app/features/auth/forgot-password/forgot-password.spec.ts
@@ -0,0 +1,75 @@
+import { TestBed } from '@angular/core/testing';
+import { ReactiveFormsModule } from '@angular/forms';
+import { ActivatedRoute, Router } from '@angular/router';
+import { HttpErrorResponse, HttpHeaders } from '@angular/common/http';
+import { of, throwError } from 'rxjs';
+import { vi } from 'vitest';
+import { ForgotPassword } from './forgot-password';
+import { AuthService } from '../../../core/services/auth.service';
+
+describe('ForgotPassword', () => {
+  let authMock: { forgotPassword: ReturnType<typeof vi.fn> };
+  let routerMock: { navigate: ReturnType<typeof vi.fn> };
+
+  beforeEach(async () => {
+    authMock = { forgotPassword: vi.fn() };
+    routerMock = { navigate: vi.fn() };
+
+    await TestBed.configureTestingModule({
+      imports: [ForgotPassword, ReactiveFormsModule],
+      providers: [
+        { provide: AuthService, useValue: authMock },
+        { provide: Router, useValue: routerMock },
+        { provide: ActivatedRoute, useValue: {} },
+      ],
+    }).compileComponents();
+  });
+
+  it('ne soumet pas si le formulaire est invalide', () => {
+    const fixture = TestBed.createComponent(ForgotPassword);
+    fixture.componentInstance.onSubmit();
+    expect(authMock.forgotPassword).not.toHaveBeenCalled();
+  });
+
+  it('affiche le message générique après une soumission réussie', () => {
+    const fixture = TestBed.createComponent(ForgotPassword);
+    const component = fixture.componentInstance;
+    component.form.setValue({ email: 'operateur@enervision.fr' });
+    authMock.forgotPassword.mockReturnValue(of(undefined));
+
+    component.onSubmit();
+
+    expect(component.submitted()).toBe(true);
+  });
+
+  it('affiche le même message générique même quand le serveur répond une erreur autre que 429', () => {
+    const fixture = TestBed.createComponent(ForgotPassword);
+    const component = fixture.componentInstance;
+    component.form.setValue({ email: 'inconnu@enervision.fr' });
+    authMock.forgotPassword.mockReturnValue(throwError(() => new HttpErrorResponse({ status: 500 })));
+
+    component.onSubmit();
+
+    expect(component.submitted()).toBe(true);
+  });
+
+  it('affiche le délai à respecter quand le taux limite est atteint', () => {
+    const fixture = TestBed.createComponent(ForgotPassword);
+    const component = fixture.componentInstance;
+    component.form.setValue({ email: 'operateur@enervision.fr' });
+    authMock.forgotPassword.mockReturnValue(
+      throwError(
+        () =>
+          new HttpErrorResponse({
+            status: 429,
+            headers: new HttpHeaders({ 'Retry-After': '900' }),
+          })
+      )
+    );
+
+    component.onSubmit();
+
+    expect(component.submitted()).toBe(false);
+    expect(component.retryAfterSeconds()).toBe(900);
+  });
+});
diff --git a/apps/frontend/src/app/features/auth/forgot-password/forgot-password.ts b/apps/frontend/src/app/features/auth/forgot-password/forgot-password.ts
new file mode 100644
index 0000000..6ceef5c
--- /dev/null
+++ b/apps/frontend/src/app/features/auth/forgot-password/forgot-password.ts
@@ -0,0 +1,53 @@
+import { Component, inject, signal } from '@angular/core';
+import { ReactiveFormsModule, FormBuilder, Validators } from '@angular/forms';
+import { RouterLink } from '@angular/router';
+import { HttpErrorResponse } from '@angular/common/http';
+import { AuthService } from '../../../core/services/auth.service';
+
+@Component({
+  selector: 'app-forgot-password',
+  standalone: true,
+  imports: [ReactiveFormsModule, RouterLink],
+  templateUrl: './forgot-password.html',
+  styleUrl: './forgot-password.scss',
+})
+export class ForgotPassword {
+  private fb = inject(FormBuilder);
+  private auth = inject(AuthService);
+
+  errorMessage = signal<string | null>(null);
+  retryAfterSeconds = signal<number | null>(null);
+  submitted = signal(false);
+  isLoading = signal(false);
+
+  form = this.fb.nonNullable.group({
+    email: ['', [Validators.required, Validators.email]],
+  });
+
+  onSubmit(): void {
+    if (this.form.invalid) return;
+
+    this.isLoading.set(true);
+    this.errorMessage.set(null);
+    this.retryAfterSeconds.set(null);
+
+    this.auth.forgotPassword(this.form.getRawValue()).subscribe({
+      // Le message affiché ne dépend jamais du fait que le compte existe ou non : la réponse
+      // du serveur est déjà générique, l'écran doit l'être aussi.
+      next: () => {
+        this.isLoading.set(false);
+        this.submitted.set(true);
+      },
+      error: (error: HttpErrorResponse) => {
+        this.isLoading.set(false);
+        if (error.status === 429) {
+          const retryAfter = error.headers.get('Retry-After');
+          this.retryAfterSeconds.set(retryAfter ? Number(retryAfter) : null);
+          this.errorMessage.set('Trop de demandes, réessayez plus tard.');
+          return;
+        }
+        this.submitted.set(true);
+      },
+    });
+  }
+}
diff --git a/apps/frontend/src/app/features/auth/login/login.html b/apps/frontend/src/app/features/auth/login/login.html
index 0083bd2..3ee100b 100644
--- a/apps/frontend/src/app/features/auth/login/login.html
+++ b/apps/frontend/src/app/features/auth/login/login.html
@@ -32,5 +32,7 @@
     <button type="submit" [disabled]="form.invalid || isLoading()">
       {{ isLoading() ? 'Connexion...' : 'Se connecter' }}
     </button>
+
+    <p class="auth-link"><a routerLink="/forgot-password">Mot de passe oublié ?</a></p>
   </form>
 </div>
diff --git a/apps/frontend/src/app/features/auth/login/login.scss b/apps/frontend/src/app/features/auth/login/login.scss
index cc415b8..45b28c0 100644
--- a/apps/frontend/src/app/features/auth/login/login.scss
+++ b/apps/frontend/src/app/features/auth/login/login.scss
@@ -79,3 +79,13 @@
   color: #dc2626;
   font-size: 0.85rem;
 }
+
+.auth-link {
+  margin-top: 1rem;
+  font-size: 0.85rem;
+  text-align: center;
+
+  a {
+    color: #3b82f6;
+  }
+}
diff --git a/apps/frontend/src/app/features/auth/login/login.spec.ts b/apps/frontend/src/app/features/auth/login/login.spec.ts
index 3c9bac1..d100e5e 100644
--- a/apps/frontend/src/app/features/auth/login/login.spec.ts
+++ b/apps/frontend/src/app/features/auth/login/login.spec.ts
@@ -1,27 +1,43 @@
 import { TestBed } from '@angular/core/testing';
 import { ReactiveFormsModule } from '@angular/forms';
-import { Router } from '@angular/router';
+import { ActivatedRoute, convertToParamMap, Router } from '@angular/router';
 import { HttpErrorResponse, HttpHeaders } from '@angular/common/http';
 import { of, throwError } from 'rxjs';
 import { vi } from 'vitest';
 import { Login } from './login';
 import { AuthService } from '../../../core/services/auth.service';
+import { MOTIF_LIEN_RESET_INVALIDE } from '../../../shared/models/auth-redirect-reason';
+
+function configure(queryParams: Record<string, string> = {}) {
+  const authMock = { login: vi.fn() };
+  const routerMock = { navigate: vi.fn() };
+
+  return {
+    authMock,
+    routerMock,
+    testBed: TestBed.configureTestingModule({
+      imports: [Login, ReactiveFormsModule],
+      providers: [
+        { provide: AuthService, useValue: authMock },
+        { provide: Router, useValue: routerMock },
+        {
+          provide: ActivatedRoute,
+          useValue: { snapshot: { queryParamMap: convertToParamMap(queryParams) } },
+        },
+      ],
+    }),
+  };
+}
 
 describe('Login', () => {
   let authMock: { login: ReturnType<typeof vi.fn> };
   let routerMock: { navigate: ReturnType<typeof vi.fn> };
 
   beforeEach(async () => {
-    authMock = { login: vi.fn() };
-    routerMock = { navigate: vi.fn() };
-
-    await TestBed.configureTestingModule({
-      imports: [Login, ReactiveFormsModule],
-      providers: [
-        { provide: AuthService, useValue: authMock },
-        { provide: Router, useValue: routerMock },
-      ],
-    }).compileComponents();
+    const attirail = configure();
+    authMock = attirail.authMock;
+    routerMock = attirail.routerMock;
+    await attirail.testBed.compileComponents();
   });
 
   it('ne soumet pas si le formulaire est invalide', () => {
@@ -84,6 +100,14 @@ describe('Login', () => {
     expect(errorEl?.textContent).toContain('30s');
   });
 
+  it('affiche le message standard quand on arrive avec ?motif=lien-expire', async () => {
+    const attirail = configure({ motif: MOTIF_LIEN_RESET_INVALIDE });
+    await attirail.testBed.compileComponents();
+    const fixture = TestBed.createComponent(Login);
+
+    expect(fixture.componentInstance.errorMessage()).toContain('expiré');
+  });
+
   it('désactive le bouton tant que le formulaire est invalide', () => {
     const fixture = TestBed.createComponent(Login);
     fixture.detectChanges();
diff --git a/apps/frontend/src/app/features/auth/login/login.ts b/apps/frontend/src/app/features/auth/login/login.ts
index 34b9ff2..f9bd085 100644
--- a/apps/frontend/src/app/features/auth/login/login.ts
+++ b/apps/frontend/src/app/features/auth/login/login.ts
@@ -1,13 +1,14 @@
 import { Component, inject, signal } from '@angular/core';
 import { ReactiveFormsModule, FormBuilder, Validators } from '@angular/forms';
-import { Router } from '@angular/router';
+import { ActivatedRoute, Router, RouterLink } from '@angular/router';
 import { HttpErrorResponse } from '@angular/common/http';
 import { AuthService } from '../../../core/services/auth.service';
+import { MESSAGE_LIEN_RESET_INVALIDE, MOTIF_LIEN_RESET_INVALIDE } from '../../../shared/models/auth-redirect-reason';
 
 @Component({
   selector: 'app-login',
   standalone: true,
-  imports: [ReactiveFormsModule],
+  imports: [ReactiveFormsModule, RouterLink],
   templateUrl: './login.html',
   styleUrl: './login.scss',
 })
@@ -15,8 +16,13 @@ export class Login {
   private fb = inject(FormBuilder);
   private auth = inject(AuthService);
   private router = inject(Router);
+  private route = inject(ActivatedRoute);
 
-  errorMessage = signal<string | null>(null);
+  errorMessage = signal<string | null>(
+    this.route.snapshot.queryParamMap.get('motif') === MOTIF_LIEN_RESET_INVALIDE
+      ? MESSAGE_LIEN_RESET_INVALIDE
+      : null,
+  );
   retryAfterSeconds = signal<number | null>(null);
   isLoading = signal(false);
 
diff --git a/apps/frontend/src/app/features/auth/reset-password/reset-password.html b/apps/frontend/src/app/features/auth/reset-password/reset-password.html
new file mode 100644
index 0000000..fad2f7e
--- /dev/null
+++ b/apps/frontend/src/app/features/auth/reset-password/reset-password.html
@@ -0,0 +1,32 @@
+<div class="auth-page">
+  <form class="auth-card" [formGroup]="form" (ngSubmit)="onSubmit()">
+    <h1>Nouveau mot de passe</h1>
+
+    @if (hasToken && !isCheckingToken()) {
+      <p class="auth-subtitle">Choisissez votre nouveau mot de passe</p>
+
+      <label for="new_password">Nouveau mot de passe</label>
+      <input
+        id="new_password"
+        type="password"
+        formControlName="new_password"
+        autocomplete="new-password"
+      />
+      <app-password-requirements [password]="password()" />
+
+      @if (errorMessage()) {
+        <p class="auth-error">{{ errorMessage() }}</p>
+      }
+
+      <button type="submit" [disabled]="form.invalid || isLoading()">
+        {{ isLoading() ? 'Modification...' : 'Valider' }}
+      </button>
+    }
+
+    @if (hasToken && isCheckingToken()) {
+      <p class="auth-subtitle">Vérification du lien...</p>
+    }
+
+    <p class="auth-link"><a routerLink="/forgot-password">Redemander un lien</a></p>
+  </form>
+</div>
diff --git a/apps/frontend/src/app/features/auth/reset-password/reset-password.scss b/apps/frontend/src/app/features/auth/reset-password/reset-password.scss
new file mode 100644
index 0000000..31c9efc
--- /dev/null
+++ b/apps/frontend/src/app/features/auth/reset-password/reset-password.scss
@@ -0,0 +1,104 @@
+:host {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  min-height: 100vh;
+  background: #f3f4f6;
+  font-family: 'Segoe UI', system-ui, sans-serif;
+}
+
+.auth-card {
+  background: #ffffff;
+  border: 1px solid #e5e7eb;
+  border-radius: 12px;
+  padding: 2.5rem;
+  width: 100%;
+  max-width: 360px;
+  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
+  display: flex;
+  flex-direction: column;
+
+  h1 {
+    margin: 0;
+    font-size: 1.5rem;
+    font-weight: 700;
+    color: #1f2937;
+  }
+
+  .auth-subtitle {
+    margin: 0.25rem 0 1.5rem;
+    color: #6b7280;
+    font-size: 0.9rem;
+    line-height: 1.4;
+  }
+
+  label {
+    font-size: 0.85rem;
+    font-weight: 600;
+    color: #374151;
+    margin-bottom: 0.35rem;
+    margin-top: 1rem;
+  }
+
+  input {
+    padding: 0.6rem 0.75rem;
+    border: 1px solid #d1d5db;
+    border-radius: 8px;
+    font-size: 0.95rem;
+
+    &:focus {
+      outline: none;
+      border-color: #3b82f6;
+      box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
+    }
+  }
+
+  button {
+    margin-top: 1.5rem;
+    padding: 0.7rem;
+    background: #3b82f6;
+    color: #fff;
+    border: none;
+    border-radius: 8px;
+    font-size: 0.95rem;
+    font-weight: 600;
+    cursor: pointer;
+
+    &:disabled {
+      background: #9ca3af;
+      cursor: not-allowed;
+    }
+
+    &:not(:disabled):hover {
+      background: #2563eb;
+    }
+  }
+}
+
+.auth-hint {
+  font-size: 0.75rem;
+  color: #9ca3af;
+  margin-top: 0.25rem;
+}
+
+.auth-error {
+  margin: 0.75rem 0 0;
+  color: #dc2626;
+  font-size: 0.85rem;
+}
+
+.auth-success {
+  margin: 0.75rem 0 0;
+  color: #16a34a;
+  font-size: 0.85rem;
+}
+
+.auth-link {
+  margin-top: 1rem;
+  font-size: 0.85rem;
+  text-align: center;
+
+  a {
+    color: #3b82f6;
+  }
+}
diff --git a/apps/frontend/src/app/features/auth/reset-password/reset-password.spec.ts b/apps/frontend/src/app/features/auth/reset-password/reset-password.spec.ts
new file mode 100644
index 0000000..38e30b5
--- /dev/null
+++ b/apps/frontend/src/app/features/auth/reset-password/reset-password.spec.ts
@@ -0,0 +1,129 @@
+import { TestBed } from '@angular/core/testing';
+import { ReactiveFormsModule } from '@angular/forms';
+import { ActivatedRoute, convertToParamMap, Router } from '@angular/router';
+import { HttpErrorResponse } from '@angular/common/http';
+import { of, throwError } from 'rxjs';
+import { vi } from 'vitest';
+import { ResetPassword } from './reset-password';
+import { AuthService } from '../../../core/services/auth.service';
+import { MOTIF_LIEN_RESET_INVALIDE } from '../../../shared/models/auth-redirect-reason';
+
+function configure(token: string | null) {
+  return TestBed.configureTestingModule({
+    imports: [ResetPassword, ReactiveFormsModule],
+    providers: [
+      {
+        provide: AuthService,
+        useValue: {
+          resetPassword: vi.fn(),
+          validateResetToken: vi.fn().mockReturnValue(of({ valid: true })),
+        },
+      },
+      { provide: Router, useValue: { navigate: vi.fn() } },
+      {
+        provide: ActivatedRoute,
+        useValue: { snapshot: { queryParamMap: convertToParamMap(token ? { token } : {}) } },
+      },
+    ],
+  }).compileComponents();
+}
+
+describe('ResetPassword', () => {
+  it("redirige vers /login avec le motif standard quand le jeton est absent de l'URL", async () => {
+    await configure(null);
+    const fixture = TestBed.createComponent(ResetPassword);
+    const router = TestBed.inject(Router) as unknown as { navigate: ReturnType<typeof vi.fn> };
+
+    fixture.detectChanges();
+
+    expect(fixture.componentInstance.hasToken).toBe(false);
+    expect(router.navigate).toHaveBeenCalledWith(['/login'], {
+      queryParams: { motif: MOTIF_LIEN_RESET_INVALIDE },
+    });
+  });
+
+  it('vérifie le jeton sans le consommer dès le chargement de la page', async () => {
+    await configure('un-secret-opaque');
+    const fixture = TestBed.createComponent(ResetPassword);
+    const auth = TestBed.inject(AuthService) as unknown as { validateResetToken: ReturnType<typeof vi.fn> };
+
+    fixture.detectChanges();
+
+    expect(auth.validateResetToken).toHaveBeenCalledWith('un-secret-opaque');
+    expect(fixture.componentInstance.isCheckingToken()).toBe(false);
+  });
+
+  it('redirige immédiatement vers /login si la vérification signale un jeton invalide', async () => {
+    await configure('un-secret-perime');
+    TestBed.overrideProvider(AuthService, {
+      useValue: { resetPassword: vi.fn(), validateResetToken: vi.fn().mockReturnValue(of({ valid: false })) },
+    });
+    const fixture = TestBed.createComponent(ResetPassword);
+    const router = TestBed.inject(Router) as unknown as { navigate: ReturnType<typeof vi.fn> };
+
+    fixture.detectChanges();
+
+    expect(router.navigate).toHaveBeenCalledWith(['/login'], {
+      queryParams: { motif: MOTIF_LIEN_RESET_INVALIDE },
+    });
+  });
+
+  it('ne soumet pas si le mot de passe ne respecte pas la politique de complexité', async () => {
+    await configure('un-secret-opaque');
+    const fixture = TestBed.createComponent(ResetPassword);
+    const component = fixture.componentInstance;
+    const auth = TestBed.inject(AuthService) as unknown as { resetPassword: ReturnType<typeof vi.fn> };
+    component.form.setValue({ new_password: 'trop-simple' });
+
+    component.onSubmit();
+
+    expect(auth.resetPassword).not.toHaveBeenCalled();
+  });
+
+  it('redirige vers /dashboard après une réinitialisation réussie', async () => {
+    await configure('un-secret-opaque');
+    const fixture = TestBed.createComponent(ResetPassword);
+    const component = fixture.componentInstance;
+    const auth = TestBed.inject(AuthService) as unknown as { resetPassword: ReturnType<typeof vi.fn> };
+    const router = TestBed.inject(Router) as unknown as { navigate: ReturnType<typeof vi.fn> };
+    component.form.setValue({ new_password: 'Un-nouveau-mot-de-passe1!' });
+    auth.resetPassword.mockReturnValue(of({ principal: { role: 'operateur' } }));
+
+    component.onSubmit();
+
+    expect(auth.resetPassword).toHaveBeenCalledWith({
+      token: 'un-secret-opaque',
+      new_password: 'Un-nouveau-mot-de-passe1!',
+    });
+    expect(router.navigate).toHaveBeenCalledWith(['/dashboard']);
+  });
+
+  it('redirige vers /login avec le motif standard quand le lien est invalide ou expiré', async () => {
+    await configure('un-secret-perime');
+    const fixture = TestBed.createComponent(ResetPassword);
+    const component = fixture.componentInstance;
+    const auth = TestBed.inject(AuthService) as unknown as { resetPassword: ReturnType<typeof vi.fn> };
+    const router = TestBed.inject(Router) as unknown as { navigate: ReturnType<typeof vi.fn> };
+    component.form.setValue({ new_password: 'Un-nouveau-mot-de-passe1!' });
+    auth.resetPassword.mockReturnValue(throwError(() => new HttpErrorResponse({ status: 400 })));
+
+    component.onSubmit();
+
+    expect(router.navigate).toHaveBeenCalledWith(['/login'], {
+      queryParams: { motif: MOTIF_LIEN_RESET_INVALIDE },
+    });
+  });
+
+  it('affiche un message générique sur une erreur inattendue (pas 400)', async () => {
+    await configure('un-secret-opaque');
+    const fixture = TestBed.createComponent(ResetPassword);
+    const component = fixture.componentInstance;
+    const auth = TestBed.inject(AuthService) as unknown as { resetPassword: ReturnType<typeof vi.fn> };
+    component.form.setValue({ new_password: 'Un-nouveau-mot-de-passe1!' });
+    auth.resetPassword.mockReturnValue(throwError(() => new HttpErrorResponse({ status: 500 })));
+
+    component.onSubmit();
+
+    expect(component.errorMessage()).toContain('invalide');
+  });
+});
diff --git a/apps/frontend/src/app/features/auth/reset-password/reset-password.ts b/apps/frontend/src/app/features/auth/reset-password/reset-password.ts
new file mode 100644
index 0000000..64ad31e
--- /dev/null
+++ b/apps/frontend/src/app/features/auth/reset-password/reset-password.ts
@@ -0,0 +1,79 @@
+import { Component, OnInit, inject, signal } from '@angular/core';
+import { toSignal } from '@angular/core/rxjs-interop';
+import { ReactiveFormsModule, FormBuilder } from '@angular/forms';
+import { ActivatedRoute, Router, RouterLink } from '@angular/router';
+import { HttpErrorResponse } from '@angular/common/http';
+import { AuthService } from '../../../core/services/auth.service';
+import { passwordValidators, PASSWORD_HINT } from '../../../shared/validators/password.validator';
+import { PasswordRequirementsChecklist } from '../../../shared/components/password-requirements/password-requirements';
+import { MOTIF_LIEN_RESET_INVALIDE } from '../../../shared/models/auth-redirect-reason';
+
+@Component({
+  selector: 'app-reset-password',
+  standalone: true,
+  imports: [ReactiveFormsModule, RouterLink, PasswordRequirementsChecklist],
+  templateUrl: './reset-password.html',
+  styleUrl: './reset-password.scss',
+})
+export class ResetPassword implements OnInit {
+  private fb = inject(FormBuilder);
+  private auth = inject(AuthService);
+  private router = inject(Router);
+  private route = inject(ActivatedRoute);
+
+  private token = this.route.snapshot.queryParamMap.get('token') ?? '';
+
+  errorMessage = signal<string | null>(null);
+  isLoading = signal(false);
+  passwordHint = PASSWORD_HINT;
+  hasToken = this.token.length > 0;
+
+  form = this.fb.nonNullable.group({
+    new_password: ['', passwordValidators],
+  });
+
+  password = toSignal(this.form.controls.new_password.valueChanges, { initialValue: '' });
+  isCheckingToken = signal(this.hasToken);
+
+  ngOnInit(): void {
+    if (!this.hasToken) {
+      this.redirigeVersLoginLienInvalide();
+      return;
+    }
+
+    this.auth.validateResetToken(this.token).subscribe({
+      next: ({ valid }) => {
+        this.isCheckingToken.set(false);
+        if (!valid) {
+          this.redirigeVersLoginLienInvalide();
+        }
+      },
+      error: () => this.isCheckingToken.set(false),
+    });
+  }
+
+  onSubmit(): void {
+    if (this.form.invalid || !this.hasToken) return;
+
+    this.isLoading.set(true);
+    this.errorMessage.set(null);
+
+    this.auth.resetPassword({ token: this.token, new_password: this.form.getRawValue().new_password }).subscribe({
+      next: () => {
+        this.router.navigate(['/dashboard']);
+      },
+      error: (error: HttpErrorResponse) => {
+        this.isLoading.set(false);
+        if (error.status === 400) {
+          this.redirigeVersLoginLienInvalide();
+          return;
+        }
+        this.errorMessage.set(`Nouveau mot de passe invalide (${this.passwordHint}).`);
+      },
+    });
+  }
+
+  private redirigeVersLoginLienInvalide(): void {
+    this.router.navigate(['/login'], { queryParams: { motif: MOTIF_LIEN_RESET_INVALIDE } });
+  }
+}
diff --git a/apps/frontend/src/app/shared/components/password-requirements/password-requirements.html b/apps/frontend/src/app/shared/components/password-requirements/password-requirements.html
new file mode 100644
index 0000000..bc7ed54
--- /dev/null
+++ b/apps/frontend/src/app/shared/components/password-requirements/password-requirements.html
@@ -0,0 +1,8 @@
+<ul class="password-requirements">
+  @for (requirement of requirements(); track requirement.label) {
+    <li [class.met]="requirement.met" [class.unmet]="!requirement.met">
+      <span class="password-requirements-icon">{{ requirement.met ? '✓' : '○' }}</span>
+      {{ requirement.label }}
+    </li>
+  }
+</ul>
diff --git a/apps/frontend/src/app/shared/components/password-requirements/password-requirements.scss b/apps/frontend/src/app/shared/components/password-requirements/password-requirements.scss
new file mode 100644
index 0000000..b5cb32b
--- /dev/null
+++ b/apps/frontend/src/app/shared/components/password-requirements/password-requirements.scss
@@ -0,0 +1,29 @@
+:host {
+  display: block;
+}
+
+.password-requirements {
+  list-style: none;
+  margin: 0.25rem 0 0;
+  padding: 0;
+  font-size: 0.8rem;
+  line-height: 1.5;
+
+  li {
+    display: flex;
+    align-items: center;
+    gap: 0.4rem;
+  }
+
+  .password-requirements-icon {
+    font-weight: 700;
+  }
+
+  .unmet {
+    color: #9ca3af;
+  }
+
+  .met {
+    color: #16a34a;
+  }
+}
diff --git a/apps/frontend/src/app/shared/components/password-requirements/password-requirements.spec.ts b/apps/frontend/src/app/shared/components/password-requirements/password-requirements.spec.ts
new file mode 100644
index 0000000..23c4bbc
--- /dev/null
+++ b/apps/frontend/src/app/shared/components/password-requirements/password-requirements.spec.ts
@@ -0,0 +1,39 @@
+import { TestBed } from '@angular/core/testing';
+import { PasswordRequirementsChecklist } from './password-requirements';
+
+describe('PasswordRequirementsChecklist', () => {
+  beforeEach(async () => {
+    await TestBed.configureTestingModule({
+      imports: [PasswordRequirementsChecklist],
+    }).compileComponents();
+  });
+
+  it('ne coche aucune règle pour un mot de passe vide', () => {
+    const fixture = TestBed.createComponent(PasswordRequirementsChecklist);
+    fixture.componentRef.setInput('password', '');
+    fixture.detectChanges();
+
+    expect(fixture.componentInstance.requirements().every((r) => !r.met)).toBe(true);
+  });
+
+  it('ne coche que les règles satisfaites pour un mot de passe partiel', () => {
+    const fixture = TestBed.createComponent(PasswordRequirementsChecklist);
+    fixture.componentRef.setInput('password', 'abcdefgh');
+    fixture.detectChanges();
+
+    const parLabel = new Map(fixture.componentInstance.requirements().map((r) => [r.label, r.met]));
+    expect(parLabel.get('8 caractères minimum')).toBe(true);
+    expect(parLabel.get('1 minuscule')).toBe(true);
+    expect(parLabel.get('1 majuscule')).toBe(false);
+    expect(parLabel.get('1 chiffre')).toBe(false);
+    expect(parLabel.get('1 caractère spécial')).toBe(false);
+  });
+
+  it('coche toutes les règles pour un mot de passe conforme', () => {
+    const fixture = TestBed.createComponent(PasswordRequirementsChecklist);
+    fixture.componentRef.setInput('password', 'Un-nouveau-mot-de-passe1!');
+    fixture.detectChanges();
+
+    expect(fixture.componentInstance.requirements().every((r) => r.met)).toBe(true);
+  });
+});
diff --git a/apps/frontend/src/app/shared/components/password-requirements/password-requirements.ts b/apps/frontend/src/app/shared/components/password-requirements/password-requirements.ts
new file mode 100644
index 0000000..36a4413
--- /dev/null
+++ b/apps/frontend/src/app/shared/components/password-requirements/password-requirements.ts
@@ -0,0 +1,19 @@
+import { Component, computed, input } from '@angular/core';
+import { PASSWORD_REQUIREMENTS } from '../../validators/password.validator';
+
+@Component({
+  selector: 'app-password-requirements',
+  standalone: true,
+  templateUrl: './password-requirements.html',
+  styleUrl: './password-requirements.scss',
+})
+export class PasswordRequirementsChecklist {
+  password = input('');
+
+  requirements = computed(() =>
+    PASSWORD_REQUIREMENTS.map((requirement) => ({
+      label: requirement.label,
+      met: requirement.test(this.password()),
+    })),
+  );
+}
diff --git a/apps/frontend/src/app/shared/models/auth-redirect-reason.ts b/apps/frontend/src/app/shared/models/auth-redirect-reason.ts
new file mode 100644
index 0000000..7feb0de
--- /dev/null
+++ b/apps/frontend/src/app/shared/models/auth-redirect-reason.ts
@@ -0,0 +1,3 @@
+export const MOTIF_LIEN_RESET_INVALIDE = 'lien-expire';
+export const MESSAGE_LIEN_RESET_INVALIDE =
+  'Ce lien de réinitialisation est invalide ou a expiré. Connectez-vous ou redemandez-en un.';
diff --git a/apps/frontend/src/app/shared/models/auth.model.ts b/apps/frontend/src/app/shared/models/auth.model.ts
index 932572f..ebed0d5 100644
--- a/apps/frontend/src/app/shared/models/auth.model.ts
+++ b/apps/frontend/src/app/shared/models/auth.model.ts
@@ -10,6 +10,15 @@ export interface PasswordChangeRequest {
   new_password: string;
 }
 
+export interface ForgotPasswordRequest {
+  email: string;
+}
+
+export interface ResetPasswordRequest {
+  token: string;
+  new_password: string;
+}
+
 export interface Principal {
   id: string;
   email: string;
diff --git a/apps/frontend/src/app/shared/validators/password.validator.spec.ts b/apps/frontend/src/app/shared/validators/password.validator.spec.ts
new file mode 100644
index 0000000..455ee36
--- /dev/null
+++ b/apps/frontend/src/app/shared/validators/password.validator.spec.ts
@@ -0,0 +1,26 @@
+import { FormControl } from '@angular/forms';
+import { passwordValidators } from './password.validator';
+
+function estValide(motDePasse: string): boolean {
+  return new FormControl(motDePasse, passwordValidators).valid;
+}
+
+describe('passwordValidators', () => {
+  it('accepte un mot de passe couvrant les quatre classes', () => {
+    expect(estValide('Un-mot-de-passe1!')).toBe(true);
+  });
+
+  it('accepte un mot de passe accentué (alignement avec le backend, ex: "Sécurité1")', () => {
+    expect(estValide('Sécurité1!')).toBe(true);
+  });
+
+  it('refuse un mot de passe sans majuscule même avec un "×" ou un "÷"', () => {
+    expect(estValide('abcdefg1×')).toBe(false);
+    expect(estValide('abcdefg1÷')).toBe(false);
+  });
+
+  it('refuse un mot de passe sans minuscule même avec un "×" ou un "÷"', () => {
+    expect(estValide('ABCDEFG1×')).toBe(false);
+    expect(estValide('ABCDEFG1÷')).toBe(false);
+  });
+});
diff --git a/apps/frontend/src/app/shared/validators/password.validator.ts b/apps/frontend/src/app/shared/validators/password.validator.ts
new file mode 100644
index 0000000..78d4066
--- /dev/null
+++ b/apps/frontend/src/app/shared/validators/password.validator.ts
@@ -0,0 +1,40 @@
+// Contrainte : `PASSWORD_PATTERN` doit rester identique au validateur Pydantic de
+// `app/schemas/auth.py` côté backend (mêmes plages de majuscules/minuscules, excluant
+// × et ÷, mêmes chiffres 0-9, même jeu de caractères spéciaux). `\w`/`\d` divergent entre
+// JavaScript (ASCII) et Python (Unicode) : une négation aurait accepté ou rejeté un même
+// mot de passe différemment d'un côté à l'autre (ex. "Sécurité1").
+
+import { Validators } from '@angular/forms';
+
+export const PASSWORD_MIN_LENGTH = 8;
+export const PASSWORD_MAX_LENGTH = 128;
+export const PASSWORD_HINT =
+  '8 à 128 caractères, avec au moins 1 majuscule, 1 minuscule, 1 chiffre et 1 caractère spécial';
+
+const SPECIAL_CHARACTERS = '!@#$%^&*()\\-_=+[\\]{};:,.?';
+const PASSWORD_PATTERN = new RegExp(
+  `^(?=.*[A-ZÀ-ÖØ-Þ])(?=.*[a-zà-öø-þ])` +
+    `(?=.*[0-9])(?=.*[${SPECIAL_CHARACTERS}]).*$`,
+);
+
+export const passwordValidators = [
+  Validators.required,
+  Validators.minLength(PASSWORD_MIN_LENGTH),
+  Validators.maxLength(PASSWORD_MAX_LENGTH),
+  Validators.pattern(PASSWORD_PATTERN),
+];
+
+export interface PasswordRequirement {
+  label: string;
+  test: (value: string) => boolean;
+}
+
+const SPECIAL_REGEX = new RegExp(`[${SPECIAL_CHARACTERS}]`);
+
+export const PASSWORD_REQUIREMENTS: PasswordRequirement[] = [
+  { label: `${PASSWORD_MIN_LENGTH} caractères minimum`, test: (v) => v.length >= PASSWORD_MIN_LENGTH },
+  { label: '1 majuscule', test: (v) => /[A-ZÀ-ÖØ-Þ]/.test(v) },
+  { label: '1 minuscule', test: (v) => /[a-zà-öø-þ]/.test(v) },
+  { label: '1 chiffre', test: (v) => /[0-9]/.test(v) },
+  { label: '1 caractère spécial', test: (v) => SPECIAL_REGEX.test(v) },
+];
diff --git a/docker-compose.yml b/docker-compose.yml
index 3d0ea63..3f7f9ea 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -27,11 +27,22 @@ services:
       start_period: 40s
     restart: unless-stopped
 
+  # Piege : Mailpit ne relaie rien vers l'exterieur, il capture tout email envoye par le
+  # backend. Aucun acces reseau sortant n'est requis ; l'UI web (8025) sert a lire les emails.
+  mailpit:
+    image: axllent/mailpit
+    ports:
+      - "${MAILPIT_SMTP_PORT:-1025}:1025"
+      - "${MAILPIT_UI_PORT:-8025}:8025"
+    restart: unless-stopped
+
   backend:
     build: ./apps/backend
     depends_on:
       db:
         condition: service_healthy
+      mailpit:
+        condition: service_started
     environment:
       APP_ENV: ${APP_ENV:-local}
       APP_DEBUG: ${APP_DEBUG:-false}
@@ -39,6 +50,11 @@ services:
       APP_SECRET_KEY: ${APP_SECRET_KEY:?}
       APP_CORS_ORIGINS: ${APP_CORS_ORIGINS:-http://localhost:4200}
       DATABASE_URL: postgresql+asyncpg://${POSTGRES_USER}:${POSTGRES_PASSWORD}@db:5432/${POSTGRES_DB}
+      APP_FRONTEND_RESET_PASSWORD_URL: ${APP_FRONTEND_RESET_PASSWORD_URL:-http://localhost:4200/reset-password}
+      APP_SMTP_HOST: mailpit
+      APP_SMTP_PORT: "1025"
+      APP_SMTP_USE_TLS: "false"
+      APP_SMTP_FROM_ADDRESS: ${APP_SMTP_FROM_ADDRESS:-no-reply@enervision.fr}
     ports:
       - "${BACKEND_PORT:-8000}:8000"
     restart: unless-stopped
diff --git a/docs/architecture/31-contrat-authentification.md b/docs/architecture/31-contrat-authentification.md
index 9c9fe66..981cd85 100644
--- a/docs/architecture/31-contrat-authentification.md
+++ b/docs/architecture/31-contrat-authentification.md
@@ -20,6 +20,8 @@ gérer : il suffit d'envoyer les requêtes avec `withCredentials`.
 | POST | `/api/v1/auth/logout` | cookie | `204` |
 | POST | `/api/v1/auth/logout-all` | jeton d'accès | `204` |
 | POST | `/api/v1/auth/password` | jeton d'accès | `200` `TokenResponse` |
+| POST | `/api/v1/auth/forgot-password` | aucune | `202` (toujours, que le compte existe ou non) |
+| POST | `/api/v1/auth/reset-password` | aucune (jeton dans le corps) | `200` `TokenResponse` |
 | GET | `/api/v1/auth/me` | jeton d'accès | `200` `PrincipalResponse` |
 | GET | `/api/v1/users` | jeton d'accès, `admin` | `200` `UserResponse[]` |
 | POST | `/api/v1/users` | jeton d'accès, `admin` | `201` `TemporaryPasswordResponse` |
@@ -51,7 +53,17 @@ codes d'erreur ci-dessous reste la référence de comportement, le schéma celle
 }
 
 // POST /auth/password
-{ "current_password": "...", "new_password": "..." }   // 12 à 128 caractères
+{ "current_password": "...", "new_password": "..." }   // 8 à 128 caractères, au moins 1 majuscule, 1 minuscule, 1 chiffre, 1 caractère spécial
+
+// POST /auth/forgot-password
+{ "email": "operateur@enervision.fr" }
+// Répond toujours 202, sans corps, que le compte existe, soit inactif, ou soit inconnu.
+
+// POST /auth/reset-password
+{ "token": "...", "new_password": "..." }   // même règle de complexité que /auth/password
+// Le jeton vient du lien reçu par email, valable 15 minutes, à usage unique. Répond
+// TokenResponse au succès (l'appareil qui pose le nouveau mot de passe reste connecté), ou 400
+// si le jeton est invalide, déjà utilisé, ou expiré.
 ```
 
 Le secret de rafraîchissement **n'apparaît jamais** dans le corps de la réponse.
@@ -70,6 +82,9 @@ Le secret de rafraîchissement **n'apparaît jamais** dans le corps de la répon
 | `403` avec `detail: "Droits insuffisants"` | rôle trop bas | masquer ou griser l'action, ne pas déconnecter |
 | `403` sur `/auth/refresh`, `/logout`, `/logout-all`, `/password` | origine hors liste autorisée (voir « Origines autorisées ») | erreur de configuration réseau, pas un cas à gérer par l'utilisateur |
 | `422` | corps invalide | le détail donne `champ` et `type`, jamais la valeur envoyée |
+| `429` sur `/auth/forgot-password` | trop de demandes | afficher l'attente, l'en-tête `Retry-After` donne les secondes |
+| `400` sur `/auth/reset-password` | lien invalide, déjà utilisé, ou expiré | inviter à redemander un lien depuis `/forgot-password` |
+| `403` sur `/auth/reset-password` | origine hors liste autorisée | erreur de configuration réseau, pas un cas à gérer par l'utilisateur |
 
 ## Les quatre règles qui comptent