GHSA-cq7v-rfgc-5c7v
Backstage: Improper preservation of access restrictions during service credential delegation
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | @backstage/backend-defaults | < 0.17.8 | 0.17.8 |
Details
As written in the advisory (Markdown source, shown as plain text).
### Impact
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.
### Patches
Patched in `@backstage/backend-defaults` version `0.17.8`
### Workarounds
If you're unable to upgrade immediately:
- If practical, replace restricted credentials with separate, purpose-specific unrestricted credentials scoped to trusted consumers.
- Restrict network-level access to Backstage backend API endpoints to trusted callers only.
References
External links from the advisory. They lead to third-party sites.
- https://github.com/backstage/backstage/security/advisories/GHSA-cq7v-rfgc-5c7v
- https://nvd.nist.gov/vuln/detail/CVE-2026-106492
- https://github.com/backstage/backstage/commit/40346245c53e1bf26dee56601e95c5c4ab9cc124
- https://github.com/backstage/backstage/commit/bc80ffdafbc92ff7b8c72347eace13cb8688fd33
- https://github.com/backstage/backstage
- https://github.com/backstage/backstage/releases/tag/v1.49.6
- https://github.com/backstage/backstage/releases/tag/v1.54.6