Santhi PrakashandAmruth Pillai 7eb6d3bdbf fix(auth): use loopback URL for MCP OAuth JWKS verification (#3297) ...

* fix(auth): use loopback URL for MCP OAuth JWKS verification

Fetch the JWKS endpoint over the internal loopback address instead of the public APP_URL, so token verification works under Docker port-mapping, reverse proxies, and other deployments where the public URL does not loop back to the Node process.

Also log the specific MCP OAuth verification error instead of swallowing it with a bare catch.

Fixes #3077

* fix(auth): normalize internal JWKS URL and throttle MCP OAuth warnings

 - Problem: default loopback JWKS URL used PORT in dev where the server
   listens on SERVER_PORT (3001), and trailing-slash overrides produced
   //api/auth/jwks; unthrottled warn logs could flood on bad bearer tokens.
 - Fix: resolveInternalBaseUrl trims/normalizes BETTER_AUTH_INTERNAL_URL,
   mirrors apps/server listen-port selection, and MCP OAuth warnings are
   throttled to once per minute.
 - Verification: pnpm exec biome check on changed files; pnpm typecheck.

* fix(auth): declare BETTER_AUTH_INTERNAL_URL in turbo globalEnv

- Problem: Turborepo strict env mode strips undeclared BETTER_AUTH_INTERNAL_URL under pnpm dev, so the JWKS override silently falls back to loopback.
- Fix: add BETTER_AUTH_INTERNAL_URL to turbo.json globalEnv (required for any new env var per CLAUDE.md).
- Verification: python3 JSON parse of turbo.json; confirmed var was absent from globalEnv before this change.

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Co-authored-by: Amruth Pillai <im.amruth@gmail.com>

2026-08-13 22:51:02 +02:00

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fix(auth): use loopback URL for MCP OAuth JWKS verification (#3297)

2026-08-13 22:51:02 +02:00

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