Backstage: Improper preservation of access restrictions during service credential delegation

[ Description ]Official description

Backstage is an open framework for building developer portals. Prior to 0.16.1 and 0.17.8, the @backstage/backend-defaults package is affected by improper preservation of access restrictions during service credential delegation. An external service credential configured with access restrictions (e.g., read-only) could bypass those restrictions by routing requests through plugin delegation paths. This could allow a restricted service to perform operations beyond its intended scope, including write operations on plugins it was restricted to read-only access for. This issue is fixed in versions 0.16.1 and 0.17.8.

[ Fixes ]Fixes and patches

• @backstage/backend-defaults 0.17.8Fixed version · GitHub Advisories · npm package @backstage/backend-defaults: upgrade to 0.17.8 or later (affected < 0.17.8)
• Patch on github.comVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD
• Patch on github.comVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD
• Patch on github.comVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD
• Patch on github.comVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD

[ Packages ]Affected open-source packages

• @backstage/backend-defaults npmAffected < 0.17.8 · fixed in 0.17.8 · GHSA-cq7v-rfgc-5c7v

[ References ]References

• github.com/backstage/backstage/commit/40346245c53e1bf26dee56601e95c5c4ab9cc124Patch
• github.com/backstage/backstage/commit/bc80ffdafbc92ff7b8c72347eace13cb8688fd33Patch
• github.com/backstage/backstage/releases/tag/v1.49.6PatchRelease Notes
• github.com/backstage/backstage/releases/tag/v1.54.6PatchRelease Notes
• github.com/backstage/backstage/security/advisories/GHSA-cq7v-rfgc-5c7vMitigationVendor Advisory