{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-106505", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-10-06T18:46:47.766Z", "datePublished": "2026-10-06T21:43:08.370Z", "dateUpdated": "2026-10-06T21:43:08.370Z"}, "containers": {"cna": {"title": "Backstage: Bypass of MkDocs configuration sanitizer in TechDocs backend", "problemTypes": [{"descriptions": [{"cweId": "CWE-426", "lang": "en", "description": "CWE-426: Untrusted Search Path", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-436", "lang": "en", "description": "CWE-436: Interpretation Conflict", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 7.7, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:L", "version": "3.1"}}], "references": [{"name": "https://github.com/backstage/backstage/security/advisories/GHSA-p75x-jh7p-ppcx", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/backstage/backstage/security/advisories/GHSA-p75x-jh7p-ppcx"}, {"name": "https://github.com/backstage/backstage/commit/a7d995f11a5d27f0efbdbe8bb6c21b06988c79c9", "tags": ["x_refsource_MISC"], "url": "https://github.com/backstage/backstage/commit/a7d995f11a5d27f0efbdbe8bb6c21b06988c79c9"}, {"name": "https://github.com/backstage/backstage/commit/ef92d3d2b76046205c580e7152956514c15640db", "tags": ["x_refsource_MISC"], "url": "https://github.com/backstage/backstage/commit/ef92d3d2b76046205c580e7152956514c15640db"}, {"name": "https://github.com/backstage/backstage/releases/tag/v1.50.5", "tags": ["x_refsource_MISC"], "url": "https://github.com/backstage/backstage/releases/tag/v1.50.5"}, {"name": "https://github.com/backstage/backstage/releases/tag/v1.54.6", "tags": ["x_refsource_MISC"], "url": "https://github.com/backstage/backstage/releases/tag/v1.54.6"}], "affected": [{"vendor": "backstage", "product": "backstage", "versions": [{"version": "< 1.50.5", "status": "affected"}, {"version": ">= 1.51.0-next.0, < 1.54.6", "status": "affected"}]}, {"vendor": "@backstage", "product": "plugin-techdocs-node", "versions": [{"version": "< 1.14.6", "status": "affected"}, {"version": ">= 1.15.0, < 1.15.4", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-10-06T21:43:08.370Z"}, "descriptions": [{"lang": "en", "value": "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. This issue is fixed in versions 1.14.6 and 1.15.4."}], "source": {"advisory": "GHSA-p75x-jh7p-ppcx", "discovery": "UNKNOWN"}}}}

{}

{"affected": [{"affectedData": [{"product": "backstage", "vendor": "backstage", "versions": [{"status": "affected", "version": "< 1.50.5"}, {"status": "affected", "version": ">= 1.51.0-next.0, < 1.54.6"}]}, {"product": "plugin-techdocs-node", "vendor": "@backstage", "versions": [{"status": "affected", "version": "< 1.14.6"}, {"status": "affected", "version": ">= 1.15.0, < 1.15.4"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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. This issue is fixed in versions 1.14.6 and 1.15.4."}], "id": "CVE-2026-106505", "lastModified": "2026-10-06T22:17:05.837", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 7.7, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:L", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.3, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-10-06T22:17:05.837", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/backstage/backstage/commit/a7d995f11a5d27f0efbdbe8bb6c21b06988c79c9"}, {"source": "security-advisories@github.com", "url": "https://github.com/backstage/backstage/commit/ef92d3d2b76046205c580e7152956514c15640db"}, {"source": "security-advisories@github.com", "url": "https://github.com/backstage/backstage/releases/tag/v1.50.5"}, {"source": "security-advisories@github.com", "url": "https://github.com/backstage/backstage/releases/tag/v1.54.6"}, {"source": "security-advisories@github.com", "url": "https://github.com/backstage/backstage/security/advisories/GHSA-p75x-jh7p-ppcx"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-426"}, {"lang": "en", "value": "CWE-436"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{}