{"id":"GHSA-hmp2-4m7g-22cv","revision":"331b0f531366455d96e391d490cabef6","records":[{"revision":"331b0f531366455d96e391d490cabef6","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-hmp2-4m7g-22cv","aliases":["CVE-2026-106503"],"title":"Backstage: Scaffolder action input authorization bypass","description":"### Impact\n\nAn authenticated user with access to affected Scaffolder templates could bypass configured action restrictions. Depending on integration credentials, this could grant unauthorized access to repositories and related source-control resources.\n\n### Patches\n\nPatched in `@backstage/plugin-scaffolder-backend` version `4.1.0`\n\n### Workarounds\n\n- Restrict affected Scaffolder actions to trusted users and configure source-control integrations with least-privilege credentials.","state":0,"publishedAt":"2026-10-07T17:59:08+00:00","modifiedAt":"2026-10-07T18:15:12.1698712+00:00","affected":[{"ecosystem":"npm","name":"@backstage/plugin-scaffolder-backend","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"3.3.1"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"npm","name":"@backstage/plugin-scaffolder-backend","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"3.4.0"},{"kind":"fixed","version":"3.4.1"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"npm","name":"@backstage/plugin-scaffolder-backend","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"4.0.0"},{"kind":"fixed","version":"4.0.3"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"npm","name":"@backstage/plugin-scaffolder-backend","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"4.0.4"},{"kind":"fixed","version":"4.1.0"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"HIGH"}],"references":["https://github.com/backstage/backstage/security/advisories/GHSA-hmp2-4m7g-22cv","https://nvd.nist.gov/vuln/detail/CVE-2026-106503","https://github.com/backstage/backstage/commit/11c1384c0649b8ab26391c6a4e4f34b80ab0d188","https://github.com/backstage/backstage/commit/a91ed72d540e80b62a73b39bb1563ff5018d52d1","https://github.com/backstage/backstage/commit/e307e4f487103d815e484291b3fda778ab9983bf","https://github.com/backstage/backstage","https://github.com/backstage/backstage/releases/tag/v1.49.6","https://github.com/backstage/backstage/releases/tag/v1.50.5","https://github.com/backstage/backstage/releases/tag/v1.54.6"],"sourceUrl":"https://github.com/advisories/GHSA-hmp2-4m7g-22cv","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-hmp2-4m7g-22cv","identifiers":["GHSA-hmp2-4m7g-22cv","CVE-2026-106503"]},"retained":false,"historicalAffected":[]}],"coverage":[]}