{"cve":"CVE-2026-106563","nvd":{"published":"2026-10-07T15:17:17.860","modified":"2026-10-16T14:50:31.303","status":"Analyzed","description":"Backstage is an open framework for building developer portals. Prior to 0.21.8, the @backstage/plugin-kubernetes-backend package is affected by improper entity validation in deprecated kubernetes services endpoint. An authenticated user with Kubernetes read permissions could access Kubernetes workload data beyond their intended scope by supplying crafted entity data to the deprecated services endpoint. The exposure is limited to read-only access to Kubernetes object metadata across configured clusters. This issue is fixed in version 0.21.8.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","score":6.5},"cwes":["CWE-20","CWE-862"],"references":["https://github.com/backstage/backstage/commit/2d5d3e77d630455d6d48cfa8f31fd3c126fd6f29","https://github.com/backstage/backstage/releases/tag/v1.54.1","https://github.com/backstage/backstage/security/advisories/GHSA-r9ph-3637-55px"],"products":["linuxfoundation:backstage","linuxfoundation:backstage\\/plugin-kubernetes-backend"],"source":"nvd","synced_at":"2026-10-19T22:58:01.639778232+00:00"},"epss":{"cve":"CVE-2026-106563","score":0.00225,"percentile":0.12996,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-r9ph-3637-55px","url":"https://osv.dev/vulnerability/GHSA-r9ph-3637-55px","summary":"Backstage: Improper entity validation in deprecated Kubernetes services endpoint","modified":"2026-10-07T18:15:11.761928207Z","packages":[{"ecosystem":"npm","name":"@backstage/plugin-kubernetes-backend","purl":"pkg:npm/%40backstage/plugin-kubernetes-backend","ranges":["<0.21.8"],"fixed":["0.21.8"]}]}],"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."]}