CVE-2026-106505

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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": "2026-10-09T17:58:21.970", "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"}, {"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.5, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 6.0, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-106505", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-10-07T16:12:41.246162Z", "version": "2.0.3"}}]}, "published": "2026-10-06T22:17:05.837", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/backstage/backstage/commit/a7d995f11a5d27f0efbdbe8bb6c21b06988c79c9"}, {"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/backstage/backstage/commit/ef92d3d2b76046205c580e7152956514c15640db"}, {"source": "security-advisories@github.com", "tags": ["Patch", "Release Notes"], "url": "https://github.com/backstage/backstage/releases/tag/v1.50.5"}, {"source": "security-advisories@github.com", "tags": ["Patch", "Release Notes"], "url": "https://github.com/backstage/backstage/releases/tag/v1.54.6"}, {"source": "security-advisories@github.com", "tags": ["Mitigation", "Vendor Advisory"], "url": "https://github.com/backstage/backstage/security/advisories/GHSA-p75x-jh7p-ppcx"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-426"}, {"lang": "en", "value": "CWE-436"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{"bugzilla": {"description": "plugin-techdocs-node: @backstage/plugin-techdocs-node: Backstage plugin-techdocs-node: Arbitrary code execution via MkDocs configuration sanitizer bypass", "id": "2547230", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2547230"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.3", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L", "status": "draft"}, "cwe": "CWE-94", "details": ["A flaw was found in the plugin-techdocs-node component of Backstage. This vulnerability allows an attacker with permission to commit changes to a repository utilizing TechDocs to bypass the MkDocs configuration sanitizer. By supplying a crafted configuration file, the attacker can achieve arbitrary code execution on the backend host during documentation generation."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability."}, "name": "CVE-2026-106505", "package_state": [{"cpe": "cpe:/a:redhat:rhdh:1", "fix_state": "Affected", "package_name": "rhdh/rhdh-hub-rhel9", "product_name": "Red Hat Developer Hub"}, {"cpe": "cpe:/a:redhat:ansible_portal:2", "fix_state": "Affected", "package_name": "ansible-automation-platform/automation-portal", "product_name": "Self-service automation portal 2"}, {"cpe": "cpe:/a:redhat:ansible_portal:2", "fix_state": "Affected", "package_name": "ansible-automation-platform/bootc-automation-portal-rhel9", "product_name": "Self-service automation portal 2"}], "public_date": "2026-10-06T21:43:08Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-106505\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-106505\nhttps://github.com/backstage/backstage/commit/a7d995f11a5d27f0efbdbe8bb6c21b06988c79c9\nhttps://github.com/backstage/backstage/commit/ef92d3d2b76046205c580e7152956514c15640db\nhttps://github.com/backstage/backstage/releases/tag/v1.50.5\nhttps://github.com/backstage/backstage/releases/tag/v1.54.6\nhttps://github.com/backstage/backstage/security/advisories/GHSA-p75x-jh7p-ppcx"], "statement": "This vulnerability is rated as Moderate because successful exploitation requires authenticated access and commit permissions to integrated documentation repositories, limiting the threat scope to authorized users. In affected Red Hat Developer Hub and Ansible Automation Platform environments where documentation generation is handled directly by the portal backend, an untrusted configuration file can evade filtering controls. Although command execution occurs on the underlying service host, the prerequisite of write privileges on documentation branches mitigates widespread, unauthenticated exposure.", "threat_severity": "Moderate"}

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