{"schema":"threatline.record/2","record":{"id":"CVE-2026-106505","aliases":["GHSA-p75x-jh7p-ppcx"],"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.","categories":["Libraries & packages"],"product":"@backstage/plugin-techdocs-node","vendor":"backstage","ecosystem":"npm","affected_ranges":[{"source":"GitHub Advisory Database","source_url":"https://github.com/advisories/GHSA-p75x-jh7p-ppcx","source_modified_at":"2026-10-07T16:23:54Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"ecosystem":"npm","name":"@backstage/plugin-techdocs-node"},"range":"< 1.15.4"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-106505","source_modified_at":"2026-10-07T16:14:14.192Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"backstage","vendor":"backstage","versions":[{"version":"< 1.50.5","status":"affected"},{"version":">= 1.51.0-next.0, < 1.54.6","status":"affected"}],"defaultStatus":null},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-106505","source_modified_at":"2026-10-07T16:14:14.192Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"plugin-techdocs-node","vendor":"@backstage","versions":[{"version":"< 1.14.6","status":"affected"},{"version":">= 1.15.0, < 1.15.4","status":"affected"}],"defaultStatus":null},{"source":"OSV","source_url":"https://osv.dev/vulnerability/GHSA-p75x-jh7p-ppcx","source_modified_at":"2026-10-07T16:30:05.289295195Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"ecosystem":"npm","name":"@backstage/plugin-techdocs-node","purl":"pkg:npm/%40backstage/plugin-techdocs-node"},"ranges":[{"events":[{"introduced":"0"},{"fixed":"1.15.4"}],"type":"SEMVER"}],"versions":[]}],"fixed_versions":[{"source":"GitHub Advisory Database","source_url":"https://github.com/advisories/GHSA-p75x-jh7p-ppcx","source_modified_at":"2026-10-07T16:23:54Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"ecosystem":"npm","name":"@backstage/plugin-techdocs-node"},"version":"1.15.4"},{"source":"OSV","source_url":"https://osv.dev/vulnerability/GHSA-p75x-jh7p-ppcx","source_modified_at":"2026-10-07T16:30:05.289295195Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"ecosystem":"npm","name":"@backstage/plugin-techdocs-node","purl":"pkg:npm/%40backstage/plugin-techdocs-node"},"version":"1.15.4"}],"cvss":7.7,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00311,"percentile":0.2283,"score_date":"2026-10-23"},"published_at":"2026-10-06T21:43:08.370Z","modified_at":"2026-10-07T16:30:05.289295195Z","provenance":[{"source":"GitHub Advisory Database","url":"https://github.com/advisories/GHSA-p75x-jh7p-ppcx","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-07T16:23:54Z"},{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-106505","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-07T16:14:14.192Z"},{"source":"OSV","url":"https://osv.dev/vulnerability/GHSA-p75x-jh7p-ppcx","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-07T16:30:05.289295195Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-106505","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["GitHub Advisory Database","CVE List","OSV","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/backstage/backstage/security/advisories/GHSA-p75x-jh7p-ppcx","tags":["x_refsource_CONFIRM"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-106505","source":"GitHub Advisory Database"},{"source":"CVE List","url":"https://github.com/backstage/backstage/commit/a7d995f11a5d27f0efbdbe8bb6c21b06988c79c9","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/backstage/backstage/commit/ef92d3d2b76046205c580e7152956514c15640db","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/backstage/backstage/releases/tag/v1.50.5","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/backstage/backstage/releases/tag/v1.54.6","tags":["x_refsource_MISC"]},{"url":"https://github.com/advisories/GHSA-p75x-jh7p-ppcx","source":"GitHub Advisory Database"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","ssvc":{"exploitation":"none","automatable":"no","technical_impact":"partial","assessed_at":"2026-10-07T16:12:41.246162Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"ecosystem","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-07T16:30:05.289295195Z","content_hash":"7da6caa7cb2039f1db8e70d824ad8d1a0237f96ef1d11cadea04ce09fb2f7122"}}