{"cve":"CVE-2026-106487","nvd":{"published":"2026-10-06T21:17:17.477","modified":"2026-10-22T18:49:32.183","status":"Analyzed","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N","score":5.0},"cwes":["CWE-441"],"references":["https://github.com/backstage/backstage/commit/c14f8be6908f0f719b16356e5492352311e28946","https://github.com/backstage/backstage/releases/tag/v1.54.6","https://github.com/backstage/backstage/security/advisories/GHSA-h53x-hjx6-25gr"],"products":["linuxfoundation:backstage","linuxfoundation:backstage\\/plugin-kubernetes-backend"],"source":"nvd","synced_at":"2026-10-23T16:39:26.291718493+00:00"},"epss":{"cve":"CVE-2026-106487","score":0.00263,"percentile":0.17943,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-h53x-hjx6-25gr","url":"https://osv.dev/vulnerability/GHSA-h53x-hjx6-25gr","summary":"Backstage: Unsupported catalog cluster authentication mode in kubernetes backend","modified":"2026-10-07T18:15:12.170259633Z","packages":[{"ecosystem":"npm","name":"@backstage/plugin-kubernetes-backend","purl":"pkg:npm/%40backstage/plugin-kubernetes-backend","ranges":["<0.21.10"],"fixed":["0.21.10"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}