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stack/apps/api/src/lib
Jason Woltje 2e11931ded
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fix(SEC-API-27): Scope RLS context to transaction boundary
createAuthMiddleware was calling SET LOCAL on the raw PrismaClient
outside of any transaction. In PostgreSQL, SET LOCAL without a
transaction acts as a session-level SET, which can leak RLS context
to subsequent requests sharing the same pooled connection, enabling
cross-tenant data access.

Wrapped the setCurrentUser call and downstream handler execution
inside a $transaction block so SET LOCAL is automatically reverted
when the transaction ends (on both success and failure).

Added comprehensive test suite for db-context module verifying:
- RLS context is set on the transaction client, not the raw client
- next() executes inside the transaction boundary
- Authentication errors prevent any transaction from starting
- Errors in downstream handlers propagate correctly

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
2026-02-06 15:07:49 -06:00
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