https://vulnerability.circl.lu/rss/recent/all/10 Most recent entries from all 2026-10-08T04:00:37.469844+00:00 Vulnerability-Lookup info@circl.lu python-feedgen Contains only the most 10 recent entries. https://vulnerability.circl.lu/vuln/fkie_cve-2026-106498 fkie_cve-2026-106498 2026-10-08T04:00:37.498367+00:00

Backstage is an open framework for building developer portals. Prior to 3.5.1, 3.6.2, 3.7.2, 3.8.2 and 3.9.1, the @backstage/plugin-catalog-backend package is affected by improper url validation in catalog entity placeholder resolution. 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. This issue is fixed in versions 3.5.1, 3.6.2, 3.7.2, 3.8.2 and 3.9.1.

 https://vulnerability.circl.lu/vuln/ghsa-qgvj-qcf8-xq73 GHSA-qgvj-qcf8-xq73 — Backstage: Improper URL validation in catalog entity placeholder resolution 2026-10-08T04:00:37.498505+00:00

Affected: npm: @backstage/plugin-catalog-backend

### 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.