{"id":"GHSA-cq7v-rfgc-5c7v","revision":"895d4aa01fd54947a867e2c91edc3ce9","records":[{"revision":"895d4aa01fd54947a867e2c91edc3ce9","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-cq7v-rfgc-5c7v","aliases":["CVE-2026-106492"],"title":"Backstage: Improper preservation of access restrictions during service credential delegation","description":"### Impact\n\nAn external service credential configured with access restrictions (e.g., read-only) could bypass those restrictions by routing requests through plugin delegation paths. This could allow a restricted service to perform operations beyond its intended scope, including write operations on plugins it was restricted to read-only access for.\n\n### Patches\n\nPatched in `@backstage/backend-defaults` version `0.17.8`\n\n### Workarounds\n\nIf you're unable to upgrade immediately:\n\n- If practical, replace restricted credentials with separate, purpose-specific unrestricted credentials scoped to trusted consumers.\n- Restrict network-level access to Backstage backend API endpoints to trusted callers only.","state":0,"publishedAt":"2026-10-07T17:59:43+00:00","modifiedAt":"2026-10-07T18:15:11.7660639+00:00","affected":[{"ecosystem":"npm","name":"@backstage/backend-defaults","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"0.17.8"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"HIGH"}],"references":["https://github.com/backstage/backstage/security/advisories/GHSA-cq7v-rfgc-5c7v","https://nvd.nist.gov/vuln/detail/CVE-2026-106492","https://github.com/backstage/backstage/commit/40346245c53e1bf26dee56601e95c5c4ab9cc124","https://github.com/backstage/backstage/commit/bc80ffdafbc92ff7b8c72347eace13cb8688fd33","https://github.com/backstage/backstage","https://github.com/backstage/backstage/releases/tag/v1.49.6","https://github.com/backstage/backstage/releases/tag/v1.54.6"],"sourceUrl":"https://github.com/advisories/GHSA-cq7v-rfgc-5c7v","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-cq7v-rfgc-5c7v","identifiers":["GHSA-cq7v-rfgc-5c7v","CVE-2026-106492"]},"retained":false,"historicalAffected":[]}],"coverage":[]}