Backstage is an open framework for building developer portals. Prior to 0.21.9, the @backstage/plugin-kubernetes-backend package is affected by sensitive information disclosure in kubernetes resource queries. An authenticated user holding the standard Kubernetes resource read permission could retrieve sensitive values that the Kubernetes plugin is designed to mask, potentially exposing credentials and other confidential material held in the connected clusters. Exposure is limited to resources that the Backstage service account is permitted to read and that match the targeted catalog entity's namespace and label selector. Deployments whose cluster credentials do not grant read access to these resources are unaffected. This issue is fixed in version 0.21.9.
Fix
Patch, vendor advisory and mitigation references on NVD 3
- https://github.com/backstage/backstage/commit/388926ae5734bc20bd6a1520d02896be834f6527 Patch
- https://github.com/backstage/backstage/releases/tag/v1.54.2 Patch, Release Notes
- https://github.com/backstage/backstage/security/advisories/GHSA-p795-mqf2-36mf Mitigation, Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 5.0 · linuxfoundationNVD modified 2026-10-16 14:55
Affected (CPE criteria) 2
cpe:2.3:a:linuxfoundation:backstage\/plugin-kubernetes-backend:*:*:*:*:*:node.js:*:*cpe:2.3:a:linuxfoundation:backstage:*:*:*:*:*:*:*:*