{"id":"CVE-2026-106487","title":"Backstage is an open framework for building developer portals","summary":"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 cat…","severity":"low","cvss":3.5,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N","cwe":["CWE-441","CWE-478"],"vendor":"backstage","product":"backstage","affected":["backstage < 1.54.6","plugin-kubernetes-backend < 0.21.10"],"patched":["@backstage/plugin-kubernetes-backend 0.21.10"],"published":"2026-10-06","updated":"2026-10-09","sourceUpdated":"2026-10-09T02:17:00.320","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-106487","references":[{"url":"https://github.com/backstage/backstage/commit/c14f8be6908f0f719b16356e5492352311e28946","label":"security-advisories@github.com"},{"url":"https://github.com/backstage/backstage/releases/tag/v1.54.6","label":"security-advisories@github.com"},{"url":"https://github.com/backstage/backstage/security/advisories/GHSA-h53x-hjx6-25gr","label":"security-advisories@github.com"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-106487"},{"url":"https://github.com/advisories/GHSA-h53x-hjx6-25gr"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-106487.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-106487"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2547193"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-106487"}],"tags":["nvd","cve.org","ghsa","npm","csaf","vex","red-hat"],"epss":0.00263,"epssPercentile":0.1802,"aliases":["GHSA-h53x-hjx6-25gr"],"ecosystem":"npm","ingestedAt":"2026-10-06T21:20:28.983Z","ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-09T01:49:36.578700Z"},"slug":"CVE-2026-106487","body":"## Overview\n\nBackstage 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-106487)\n\nAffected packages:\n\n- `@backstage/plugin-kubernetes-backend < 0.21.10`\n\nPatched in:\n\n- `@backstage/plugin-kubernetes-backend 0.21.10`\n\nSource: https://github.com/advisories/GHSA-h53x-hjx6-25gr\n\n## Vendor advisories\n\n- **Red Hat VEX** · Low · affected: Red Hat Developer Hub, Self-service automation portal 2 · no fix planned: Red Hat Developer Hub, Self-service automation portal 2 · updated 2026-10-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-106487.json)","depth":"sunlit","depthScore":19,"depthScoreParts":{"impact":19.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}