Impact

An authenticated Backstage user could craft a catalog entity with placeholder directives that reference resources outside the entity's source repository. Under certain configurations, this could allow access to data not intended to be available to the user.

Patches

Patched in @backstage/plugin-catalog-backend version 3.9.1

Workarounds

If you're not able to update immediately:

- Limit the scope of integration credentials (e.g., GitHub tokens) to only the repositories that Backstage needs to access.