{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-106556", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-10-06T20:31:59.016Z", "datePublished": "2026-10-07T14:39:36.015Z", "dateUpdated": "2026-10-07T14:39:36.015Z"}, "containers": {"cna": {"title": "Backstage: Configuration bypass in TechDocs mkdocs.yml sanitization", "problemTypes": [{"descriptions": [{"cweId": "CWE-78", "lang": "en", "description": "CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-184", "lang": "en", "description": "CWE-184: Incomplete List of Disallowed Inputs", "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-g2hj-v2j6-vfvg", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/backstage/backstage/security/advisories/GHSA-g2hj-v2j6-vfvg"}, {"name": "https://github.com/backstage/backstage/commit/25125ee727a3de3418a8fa6a9e458cd5b73ecf26", "tags": ["x_refsource_MISC"], "url": "https://github.com/backstage/backstage/commit/25125ee727a3de3418a8fa6a9e458cd5b73ecf26"}, {"name": "https://github.com/backstage/backstage/commit/b6d1aea0bef99b8dfec3c8746032474867ba677a", "tags": ["x_refsource_MISC"], "url": "https://github.com/backstage/backstage/commit/b6d1aea0bef99b8dfec3c8746032474867ba677a"}, {"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": "2026-10-07T14:39:36.015Z"}, "descriptions": [{"lang": "en", "value": "Backstage is an open framework for building developer portals. Prior to 1.14.6, the @backstage/plugin-techdocs-node package is affected by configuration bypass in techdocs mkdocs.yml sanitization. Insufficient validation of MkDocs configuration during TechDocs generation could allow an authenticated user who can register or modify documentation sources to execute arbitrary commands in the build environment. Impact is limited to resources accessible to the TechDocs backend or build container. This issue is fixed in versions 1.14.6 and 1.15.4."}], "source": {"advisory": "GHSA-g2hj-v2j6-vfvg", "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, the @backstage/plugin-techdocs-node package is affected by configuration bypass in techdocs mkdocs.yml sanitization. Insufficient validation of MkDocs configuration during TechDocs generation could allow an authenticated user who can register or modify documentation sources to execute arbitrary commands in the build environment. Impact is limited to resources accessible to the TechDocs backend or build container. This issue is fixed in versions 1.14.6 and 1.15.4."}], "id": "CVE-2026-106556", "lastModified": "2026-10-07T15:52:18.453", "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": "2026-10-07T15:17:12.960", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/backstage/backstage/commit/25125ee727a3de3418a8fa6a9e458cd5b73ecf26"}, {"source": "security-advisories@github.com", "url": "https://github.com/backstage/backstage/commit/b6d1aea0bef99b8dfec3c8746032474867ba677a"}, {"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-g2hj-v2j6-vfvg"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-78"}, {"lang": "en", "value": "CWE-184"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{}