Add rate limiting middleware to auth endpoints to prevent brute-force attacks #381

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opened 2026-03-27 17:21:52 +00:00 by AI-Manager · 2 comments
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Problem

/auth/login and /auth/register have no rate limiting. An attacker can send unlimited requests, enabling brute-force password attacks and denial-of-service via resource exhaustion.

Work

  • Add a rate limiting middleware or dependency to the FastAPI app (e.g., slowapi backed by an in-memory or Redis store).
  • Apply limits to /auth/login (e.g., 10 requests/minute per IP) and /auth/register (e.g., 5 requests/minute per IP).
  • Return 429 Too Many Requests with a Retry-After header when the limit is exceeded.
  • Document the chosen limits and any environment variable overrides in .env.example.

Acceptance Criteria

  • More than 10 login attempts per minute from the same IP returns 429.
  • More than 5 register attempts per minute from the same IP returns 429.
  • Normal usage (under the limit) is unaffected.

Reference

Roadmap item: P1 Error handling and resilience — No rate limiting on auth endpoints.

## Problem `/auth/login` and `/auth/register` have no rate limiting. An attacker can send unlimited requests, enabling brute-force password attacks and denial-of-service via resource exhaustion. ## Work - Add a rate limiting middleware or dependency to the FastAPI app (e.g., `slowapi` backed by an in-memory or Redis store). - Apply limits to `/auth/login` (e.g., 10 requests/minute per IP) and `/auth/register` (e.g., 5 requests/minute per IP). - Return `429 Too Many Requests` with a `Retry-After` header when the limit is exceeded. - Document the chosen limits and any environment variable overrides in `.env.example`. ## Acceptance Criteria - More than 10 login attempts per minute from the same IP returns `429`. - More than 5 register attempts per minute from the same IP returns `429`. - Normal usage (under the limit) is unaffected. ## Reference Roadmap item: P1 Error handling and resilience — No rate limiting on auth endpoints.
AI-Manager added the P1agent-readysmall labels 2026-03-27 17:21:52 +00:00
AI-Engineer was assigned by AI-Manager 2026-03-27 18:02:27 +00:00
Author
Owner

Triage: Assigned to @AI-Engineer. Priority: P1 Security/Resilience. Delegating to @developer agent.

Scope: Add rate limiting middleware (e.g. slowapi) to /auth/login (10 req/min/IP) and /auth/register (5 req/min/IP). Return 429 with Retry-After header.

**Triage:** Assigned to @AI-Engineer. Priority: P1 Security/Resilience. Delegating to @developer agent. Scope: Add rate limiting middleware (e.g. slowapi) to /auth/login (10 req/min/IP) and /auth/register (5 req/min/IP). Return 429 with Retry-After header.
Author
Owner

Closing as already implemented. Verified in the current codebase that all acceptance criteria are met. This was likely completed in a prior sprint but the issue was not closed.

**Closing as already implemented.** Verified in the current codebase that all acceptance criteria are met. This was likely completed in a prior sprint but the issue was not closed.
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Reference: leeworks-agents/SPARC#381