{"id":"CVE-2026-106487","published":"2026-10-06T21:17:17.477","lastModified":"2026-10-09T02:17:00.320","description":"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.","cvssScore":3.5,"cvssSeverity":"LOW","cvssVector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N","cwes":["CWE-441"],"vendors":[],"products":[],"references":[{"url":"https://github.com/backstage/backstage/commit/c14f8be6908f0f719b16356e5492352311e28946","tags":[]},{"url":"https://github.com/backstage/backstage/releases/tag/v1.54.6","tags":[]},{"url":"https://github.com/backstage/backstage/security/advisories/GHSA-h53x-hjx6-25gr","tags":[]}],"exploitRefs":[{"url":"https://github.com/backstage/backstage/commit/c14f8be6908f0f719b16356e5492352311e28946","tags":[]},{"url":"https://github.com/backstage/backstage/releases/tag/v1.54.6","tags":[]},{"url":"https://github.com/backstage/backstage/security/advisories/GHSA-h53x-hjx6-25gr","tags":[]}],"hasPoc":true,"ai":null}