CVE-2026-106456

The Backstage open framework for developer portals is affected by a vulnerability in the @backstage/plugin-proxy-backend package (versions 0.5.0 through 0.6.18 ). The root cause is inconsistent credential enforcement for overlapping proxy routes; if a parent path allows unauthenticated access whi...

CVE-2026-106456 Backstage: Inconsistent credential enforcement for overlapping proxy routes

Backstage is an open framework for building developer portals. From 0.5.0 until 0.6.18, the @backstage/plugin-proxy-backend package is affected by inconsistent credential enforcement for overlapping proxy routes. An operator can configure overlapping proxy paths with different credential...

CVE-2026-106456 Backstage: Inconsistent credential enforcement for overlapping proxy routes

Backstage is an open framework for building developer portals. From 0.5.0 until 0.6.18, the @backstage/plugin-proxy-backend package is affected by inconsistent credential enforcement for overlapping proxy routes. An operator can configure overlapping proxy paths with different credential...