{"id":"GHSA-gp6m-x9vw-5c5x","summary":"Backstage has improper authorization in GitLab organizational user ingestion","details":"### Impact\n\nDeployments that enable GitLab organization event ingestion and rely on scoped catalog users as an access boundary may admit an unintended catalog identity. Depending on sign-in and permission configuration, this may allow unauthorized access with the permissions of a standard authenticated user.\n\n### Patches\n\n- Upgrade `@backstage/plugin-catalog-backend-module-gitlab` to version `0.8.7`.\n\n### Workarounds\n\n- Disable event-driven GitLab organization ingestion and rely on scheduled discovery until upgrading.\n- Enforce organization membership independently at the authenticating proxy or sign-in resolver.","aliases":["CVE-2026-106463"],"modified":"2026-10-07T18:15:10.729437546Z","published":"2026-10-07T18:01:39Z","database_specific":{"severity":"MODERATE","github_reviewed":true,"github_reviewed_at":"2026-10-07T18:01:39Z","nvd_published_at":"2026-10-06T21:17:17Z","cwe_ids":["CWE-863"]},"references":[{"type":"WEB","url":"https://github.com/backstage/backstage/security/advisories/GHSA-gp6m-x9vw-5c5x"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-106463"},{"type":"WEB","url":"https://github.com/backstage/backstage/commit/c211b4b67d28efd2f4fac63e35e2ac515e305cb3"},{"type":"PACKAGE","url":"https://github.com/backstage/backstage"},{"type":"WEB","url":"https://github.com/backstage/backstage/releases/tag/v1.54.6"}],"affected":[{"package":{"name":"@backstage/plugin-catalog-backend-module-gitlab","ecosystem":"npm","purl":"pkg:npm/%40backstage/plugin-catalog-backend-module-gitlab"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.8.7"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-gp6m-x9vw-5c5x/GHSA-gp6m-x9vw-5c5x.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N"}]}