{"schema_version":"1.9.0","id":"GHSA-p75x-jh7p-ppcx","published":"2026-10-07T16:23:52Z","modified":"2026-10-07T16:30:05.289295195Z","aliases":["CVE-2026-106505"],"summary":"Backstage: Bypass of MkDocs configuration sanitizer in TechDocs backend","details":"### Impact\n\nUsers with the ability to commit changes to a repository that uses TechDocs can circumvent the MkDocs configuration file sanitizer introduced in response to CVE-2026-25153 and execute arbitrary code on the TechDocs backend host during documentation generation.\n\n### Patches\n\nPatched in`@backstage/plugin-techdocs-node` version `1.15.4`\n\n### Workarounds\n\nIf you cannot upgrade immediately:\n\n- Use Docker mode with restricted access: Configure TechDocs with `runIn: docker` instead of `runIn: local`. This provides container isolation, though it does not fully mitigate the risk.\n- Limit repository write access to trusted parties, since exploitation requires the ability to commit files to a repository with TechDocs enabled.\n- Review incoming changes to MkDocs configuration files as part of your code review process.","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-p75x-jh7p-ppcx/GHSA-p75x-jh7p-ppcx.json"}}],"references":[{"type":"WEB","url":"https://github.com/backstage/backstage/security/advisories/GHSA-p75x-jh7p-ppcx"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-106505"},{"type":"WEB","url":"https://github.com/backstage/backstage/commit/a7d995f11a5d27f0efbdbe8bb6c21b06988c79c9"},{"type":"WEB","url":"https://github.com/backstage/backstage/commit/ef92d3d2b76046205c580e7152956514c15640db"},{"type":"PACKAGE","url":"https://github.com/backstage/backstage"},{"type":"WEB","url":"https://github.com/backstage/backstage/releases/tag/v1.50.5"},{"type":"WEB","url":"https://github.com/backstage/backstage/releases/tag/v1.54.6"}],"database_specific":{"cwe_ids":["CWE-426","CWE-436"],"github_reviewed":true,"github_reviewed_at":"2026-10-07T16:23:52Z","nvd_published_at":"2026-10-06T22:17:05Z","severity":"HIGH"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:L"}]}