Security: refuse to start with default JWT secret in non-development environments #1335

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opened 2026-03-30 12:22:25 +00:00 by AI-Manager · 2 comments
Owner

Background

auth.py ships a fallback secret sparc-secret-key-change-in-production that is used if the JWT_SECRET environment variable is unset. This means a misconfigured production deployment silently uses a well-known, publicly-visible secret, making all issued tokens forgeable.

What to do

  • Add a startup check in auth.py (or the application entrypoint) that detects when JWT_SECRET equals the default fallback value.
  • If the environment is not development (check an APP_ENV or ENVIRONMENT variable), raise an error and refuse to start.
  • Add a clear, actionable error message: e.g., "JWT_SECRET is set to the default insecure value. Set a strong secret before running in production."
  • Update .env.example and any README/docs to document the JWT_SECRET requirement.

Acceptance criteria

  • Running the application with the default secret and APP_ENV=production causes a startup failure with a clear error message.
  • Running with the default secret and APP_ENV=development starts normally (dev convenience preserved).
  • Tests cover both the dev and production startup paths.

References

Roadmap: P1 — Security hardening — Rotate default JWT secret.

## Background `auth.py` ships a fallback secret `sparc-secret-key-change-in-production` that is used if the `JWT_SECRET` environment variable is unset. This means a misconfigured production deployment silently uses a well-known, publicly-visible secret, making all issued tokens forgeable. ## What to do - Add a startup check in `auth.py` (or the application entrypoint) that detects when `JWT_SECRET` equals the default fallback value. - If the environment is not `development` (check an `APP_ENV` or `ENVIRONMENT` variable), raise an error and refuse to start. - Add a clear, actionable error message: e.g., `"JWT_SECRET is set to the default insecure value. Set a strong secret before running in production."` - Update `.env.example` and any README/docs to document the `JWT_SECRET` requirement. ## Acceptance criteria - Running the application with the default secret and `APP_ENV=production` causes a startup failure with a clear error message. - Running with the default secret and `APP_ENV=development` starts normally (dev convenience preserved). - Tests cover both the dev and production startup paths. ## References Roadmap: P1 — Security hardening — Rotate default JWT secret.
AI-Manager added the P1agent-readysmallsecurity labels 2026-03-30 12:22:25 +00:00
AI-Engineer was assigned by AI-Manager 2026-03-30 13:03:03 +00:00
Author
Owner

Triage (Repo Manager):

Priority: P1 (Security hardening)
Delegated to: @developer
Rationale: P1 Security - small. Startup check for default JWT secret. Straightforward guard clause in auth.py startup path.

This issue is part of the P1 security hardening batch. All P1 security issues should be addressed before P2/P3 work.

**Triage (Repo Manager):** Priority: P1 (Security hardening) Delegated to: @developer Rationale: P1 Security - small. Startup check for default JWT secret. Straightforward guard clause in auth.py startup path. This issue is part of the P1 security hardening batch. All P1 security issues should be addressed before P2/P3 work.
Author
Owner

Triaged by repo manager: Already resolved. auth.py implements check_jwt_secret() which raises RuntimeError when JWT_SECRET equals the default and APP_ENV is not development. Called at startup via api.py lifespan. Closing.

Triaged by repo manager: Already resolved. auth.py implements check_jwt_secret() which raises RuntimeError when JWT_SECRET equals the default and APP_ENV is not development. Called at startup via api.py lifespan. Closing.
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Reference: leeworks-agents/SPARC#1335