238b932c86
Every login attempt, including unknown users (via DUMMY_HASH), forces a full Argon2id verify with no rate limit, letting a flood take down the login endpoint / shared host via hashing-cost amplification. Add a pre-auth per-IP limiter (RateLimiterRepository, default 20/min) as the first check in AuthController::login, before any user lookup or password hashing. |
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