{"id":"CVE-2026-106505","revision":null,"records":[{"revision":"4cfb41cd777b4ed893ae7fdabc2e23e5","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-106505","aliases":[],"title":"Backstage: Bypass of MkDocs configuration sanitizer in TechDocs backend","description":"Backstage is an open framework for building developer portals. Prior to 1.14.6 and 1.15.4, the @backstage/plugin-techdocs-node package is affected by bypass of mkdocs configuration sanitizer in techdocs backend. Users 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. 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This issue is fixed in versions 1.14.6 and 1.15.4.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:L","score":7.7,"severity":null}],"references":["https://github.com/backstage/backstage/security/advisories/GHSA-p75x-jh7p-ppcx","https://github.com/backstage/backstage/commit/a7d995f11a5d27f0efbdbe8bb6c21b06988c79c9","https://github.com/backstage/backstage/commit/ef92d3d2b76046205c580e7152956514c15640db","https://github.com/backstage/backstage/releases/tag/v1.50.5","https://github.com/backstage/backstage/releases/tag/v1.54.6"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-94070","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Oct 6, 2026, 9:43:08 PM","dateUpdated":"Oct 7, 2026, 4:14:14 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. 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This issue is fixed in versions 1.14.6 and 1.15.4.","state":0,"publishedAt":"2026-10-06T22:17:05.837+00:00","modifiedAt":"2026-10-09T17:58:21.97+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:L","score":7.7,"severity":"HIGH"},{"system":"CVSS 3.1 · nvd@nist.gov · Primary","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","score":8.5,"severity":"HIGH"}],"references":["https://github.com/backstage/backstage/commit/a7d995f11a5d27f0efbdbe8bb6c21b06988c79c9","https://github.com/backstage/backstage/commit/ef92d3d2b76046205c580e7152956514c15640db","https://github.com/backstage/backstage/releases/tag/v1.50.5","https://github.com/backstage/backstage/releases/tag/v1.54.6","https://github.com/backstage/backstage/security/advisories/GHSA-p75x-jh7p-ppcx"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-106505","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Analyzed","weaknesses":["CWE-426","CWE-436"],"productCriteria":["cpe:2.3:a:linuxfoundation:backstage_plugin-techdocs-node:*:*:*:*:*:*:*:*","cpe:2.3:a:linuxfoundation:backstage:*:*:*:*:*:*:*:*","cpe:2.3:a:linuxfoundation:backstage:1.51.0:-:*:*:*:*:*:*","cpe:2.3:a:linuxfoundation:backstage:1.51.0:next0:*:*:*:*:*:*","cpe:2.3:a:linuxfoundation:backstage:1.51.0:next1:*:*:*:*:*:*","cpe:2.3:a:linuxfoundation:backstage:1.51.0:next2:*:*:*:*:*:*","cpe:2.3:a:linuxfoundation:backstage:1.51.0:next3:*:*:*:*:*:*"],"sourceDates":{"published":"2026-10-06T22:17:05.837","lastModified":"2026-10-09T17:58:21.970"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. 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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.","state":0,"publishedAt":"2026-10-07T16:23:52+00:00","modifiedAt":"2026-10-07T16:30:05.2892952+00:00","affected":[{"ecosystem":"npm","name":"@backstage/plugin-techdocs-node","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"1.15.4"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:L","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"HIGH"}],"references":["https://github.com/backstage/backstage/security/advisories/GHSA-p75x-jh7p-ppcx","https://nvd.nist.gov/vuln/detail/CVE-2026-106505","https://github.com/backstage/backstage/commit/a7d995f11a5d27f0efbdbe8bb6c21b06988c79c9","https://github.com/backstage/backstage/commit/ef92d3d2b76046205c580e7152956514c15640db","https://github.com/backstage/backstage","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-p75x-jh7p-ppcx","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-p75x-jh7p-ppcx","identifiers":["GHSA-p75x-jh7p-ppcx","CVE-2026-106505"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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