{"id":"CVE-2026-106487","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-106487","generatedAt":"2026-10-28T02:59:04.149Z","title":"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.","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.","published":"2026-10-06T21:17:17.000Z","lastModified":"2026-10-22T18:49:32.000Z","status":"Analyzed","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N"},"cwe":["CWE-441"],"affected":["linuxfoundation/backstage\\/plugin-kubernetes-backend","linuxfoundation/backstage"],"epss":{"score":0.00263,"percentile":0.17957,"date":"2026-10-26","history":[{"date":"2026-10-07","score":0.00221,"percentile":0.11604}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.26%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"scored","label":"Newly scored","at":"2026-10-22T19:46:07.000Z","detail":{"from":"3.5","score":"5.0","severity":"MEDIUM","fromSeverity":"LOW"},"summary":"Now scored CVSS 5.0 MEDIUM (was 3.5)."},{"kind":"new","label":"New CVE","at":"2026-10-06T21:17:17.000Z","detail":{"score":"3.5","severity":"LOW","publishedAt":"2026-10-06T21:17:17.477Z"},"summary":"New CVE, medium severity (CVSS 5.0)."}],"references":[{"url":"https://github.com/backstage/backstage/commit/c14f8be6908f0f719b16356e5492352311e28946","tags":["Patch"],"source":"security-advisories@github.com"},{"url":"https://github.com/backstage/backstage/releases/tag/v1.54.6","tags":["Patch","Release Notes"],"source":"security-advisories@github.com"},{"url":"https://github.com/backstage/backstage/security/advisories/GHSA-h53x-hjx6-25gr","tags":["Mitigation","Vendor Advisory"],"source":"security-advisories@github.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-106487","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}