- Validate the email claim with `windmill_common::users::VALID_EMAIL` (the `usr`
table's own constraint) plus the 254-byte bound, rather than a hand-rolled
predicate. It requires an `@`, which is what keeps a guest's name its own
principal, never a `u/<user>` or `g/<group>`.
- Reject an `app_path` claim carrying a scope metacharacter (`*`, `,`, `:`,
whitespace) before authenticating: it is interpolated into `apps:read:<path>`
and `apps:run:<path>`, where `*` or `,` would widen the guest past its one app.
- `isJwt` on the custom-path route normalises base64url before `atob`, so a
header carrying `-`/`_` (a `kid`, a signature) is recognised instead of taken
for a path segment; it also checks the three-segment structure.
- Drop the dead stale-key carry-forward in the blocking JWKS path (a stale-good
entry is served by the fast path) and clean up the test's env var.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VF3v6LA9399gNphmZaHYG3
Ruben FiszelandClaude Opus 4.8
cb8fa45114