Backstage: Catalog unprocessed read endpoints allow authenticated cross-owner data access without permission checks

Impact

The unprocessed entities read endpoints in @backstage/plugin-catalog-backend-module-unprocessed do not enforce permission authorization checks. Any authenticated user can access unprocessed entity records regardless of ownership. This is an information disclosure vulnerability affecting Backstage installations using this module.

Patches

This is patched in @backstage/plugin-catalog-backend-module-unprocessed version 0.6.11, @backstage/plugin-catalog-unprocessed-entities-common version 0.0.15 and @backstage/plugin-catalog-unprocessed-entities version 0.2.30. Users should upgrade all packages.

Workarounds

If users cannot upgrade, they can remove the @backstage/plugin-catalog-backend-module-unprocessed module from their backend until the patch is applied. There is no configuration-based workaround to add permission checks to these endpoints
without upgrading.