{"cve":"CVE-2026-106561","nvd":{"published":"2026-10-07T15:17:17.490","modified":"2026-10-16T14:55:13.473","status":"Analyzed","description":"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.","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-200","CWE-863"],"references":["https://github.com/backstage/backstage/commit/388926ae5734bc20bd6a1520d02896be834f6527","https://github.com/backstage/backstage/releases/tag/v1.54.2","https://github.com/backstage/backstage/security/advisories/GHSA-p795-mqf2-36mf"],"products":["linuxfoundation:backstage","linuxfoundation:backstage\\/plugin-kubernetes-backend"],"source":"nvd","synced_at":"2026-10-19T22:58:01.639778232+00:00"},"epss":{"cve":"CVE-2026-106561","score":0.00197,"percentile":0.09339,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-p795-mqf2-36mf","url":"https://osv.dev/vulnerability/GHSA-p795-mqf2-36mf","summary":"Backstage has a sensitive information disclosure in Kubernetes resource queries","modified":"2026-10-07T18:15:11.771769259Z","packages":[{"ecosystem":"npm","name":"@backstage/plugin-kubernetes-backend","purl":"pkg:npm/%40backstage/plugin-kubernetes-backend","ranges":["<0.21.9"],"fixed":["0.21.9"]}]}],"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."]}