{"schema_version":"1.9.0","id":"GHSA-qmw3-745m-w99g","published":"2026-10-07T18:03:12Z","modified":"2026-10-07T18:15:12.165363848Z","aliases":["CVE-2026-106558"],"summary":"Backstage: Improper validation of TechDocs MkDocs configuration","details":"### Impact\n\nAn attacker who can provide configuration to a TechDocs build may execute code in the generator runtime. Impact is greatest when documentation generation runs with backend credentials or host access.\n\n### Patches\n\nPatched in `@backstage/plugin-techdocs-node` version `1.15.4`.\n\n### Workarounds\n\nUse external TechDocs generation in an isolated environment without sensitive credentials or host access. Restrict and review changes to documentation configuration before generation.","affected":[{"package":{"name":"@backstage/plugin-techdocs-node","ecosystem":"npm","purl":"pkg:npm/%40backstage/plugin-techdocs-node"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.15.4"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-qmw3-745m-w99g/GHSA-qmw3-745m-w99g.json"}}],"references":[{"type":"WEB","url":"https://github.com/backstage/backstage/security/advisories/GHSA-qmw3-745m-w99g"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-106558"},{"type":"WEB","url":"https://github.com/backstage/backstage/commit/32723a0fe4e12ed80535fc65d5331765c55aa91b"},{"type":"WEB","url":"https://github.com/backstage/backstage/commit/944edb51c8524d3664b18f2d57ba101b1c93b709"},{"type":"WEB","url":"https://github.com/backstage/backstage/commit/f18e9abcc6051491862b15e4fc60e69f8d52310c"},{"type":"PACKAGE","url":"https://github.com/backstage/backstage"},{"type":"WEB","url":"https://github.com/backstage/backstage/releases/tag/v1.50.7"},{"type":"WEB","url":"https://github.com/backstage/backstage/releases/tag/v1.54.9"},{"type":"WEB","url":"https://github.com/backstage/backstage/releases/tag/v1.55.2"}],"database_specific":{"cwe_ids":["CWE-502"],"github_reviewed":true,"github_reviewed_at":"2026-10-07T18:03:12Z","nvd_published_at":"2026-10-07T15:17:15Z","severity":"HIGH"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}