CVE-2026-106487
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N
Summary
Backstage is an open framework for building developer portals. Prior to 0.21.10, the @backstage/plugin-kubernetes-backend package is affected by unsupported catalog cluster authentication mode in kubernetes backend. Deployments using catalog cluster discovery may be affected when catalog contributors can create or modify kubernetes-cluster Resource entities. With the required endpoint permissions and pod RBAC, the backend can use its local in-cluster identity, potentially exposing Kubernetes resources readable by that identity. The credential is used only with the local in-cluster API endpoint and is not sent to the catalog-supplied endpoint. This issue is fixed in version 0.21.10.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| backstage | backstage | < 1.54.6 | affected |
| @backstage | plugin-kubernetes-backend | < 0.21.10 | affected |
Weaknesses
- CWE-441: CWE-441: Unintended Proxy or Intermediary ('Confused Deputy')
References
- https://github.com/backstage/backstage/security/advisories/GHSA-h53x-hjx6-25gr
- https://github.com/backstage/backstage/commit/c14f8be6908f0f719b16356e5492352311e28946
- https://github.com/backstage/backstage/releases/tag/v1.54.6
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