CVE-2026-25153

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Limit who can modify `mkdocs.yml` files in repositories that TechDocs processes; only allow trusted contributors. Implement PR review requirements for changes to `mkdocs.yml` files to detect malicious `hooks` configurations before they are merged. Use MkDocs < 1.4.0 (e.g., 1.3.1) which does not support hooks. Note: This may limit access to newer MkDocs features. 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En versiones de @backstage/plugin-techdocs-node anteriores a 1.13.11 y 1.14.1, cuando TechDocs est\u00e1 configurado con 'runIn: local', un actor malicioso que puede enviar o modificar el archivo 'mkdocs.yml' de un repositorio puede ejecutar c\u00f3digo Python arbitrario en el server de compilaci\u00f3n de TechDocs a trav\u00e9s de la configuraci\u00f3n de hooks de MkDocs. Las versiones 1.13.11 y 1.14.1 de @backstage/plugin-techdocs-node contienen una correcci\u00f3n. La correcci\u00f3n introduce una lista de permitidos (allowlist) de claves de configuraci\u00f3n de MkDocs compatibles. Las claves de configuraci\u00f3n no compatibles (incluyendo 'hooks') ahora se eliminan de 'mkdocs.yml' antes de ejecutar el generador, con una advertencia registrada para indicar qu\u00e9 claves se eliminaron. Los usuarios de '@techdocs/cli' tambi\u00e9n deben actualizar a la \u00faltima versi\u00f3n, que incluye la dependencia corregida de '@backstage/plugin-techdocs-node'. Algunas soluciones alternativas est\u00e1n disponibles. Configure TechDocs con 'runIn: docker' en lugar de 'runIn: local' para proporcionar aislamiento de contenedor, aunque no mitiga completamente el riesgo. Limite qui\u00e9n puede modificar los archivos 'mkdocs.yml' en los repositorios que TechDocs procesa; solo permita colaboradores de confianza. Implemente requisitos de revisi\u00f3n de PR para cambios en los archivos 'mkdocs.yml' para detectar configuraciones maliciosas de 'hooks' antes de que se fusionen. Use MkDocs &lt; 1.4.0 (por ejemplo, 1.3.1) que no soporta hooks. Nota: Esto puede limitar el acceso a caracter\u00edsticas m\u00e1s nuevas de MkDocs. La compilaci\u00f3n de documentaci\u00f3n en pipelines de CI/CD usando '@techdocs/cli' no mitiga esta vulnerabilidad, ya que la CLI utiliza el mismo paquete vulnerable de '@backstage/plugin-techdocs-node'."}], "id": "CVE-2026-25153", "lastModified": "2026-07-15T02:18:52.727", "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": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}, {"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": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-25153", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-02-02T16:25:14.817846Z", "version": "2.0.3"}}]}, "published": "2026-01-30T22:15:56.343", "references": [{"source": "security-advisories@github.com", "tags": ["Vendor Advisory"], "url": "https://github.com/backstage/backstage/security/advisories/GHSA-6jr7-99pf-8vgf"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://access.redhat.com/errata/RHSA-2026:6174"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://access.redhat.com/errata/RHSA-2026:6802"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://access.redhat.com/security/cve/CVE-2026-25153"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2435576"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-25153.json"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-94"}], "source": "security-advisories@github.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-94"}], "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "type": "Secondary"}]}

{"bugzilla": {"description": "@backstage/plugin-techdocs-node: @backstage/plugin-techdocs-node vulnerable to arbitrary code execution via MkDocs hooks", "id": "2435576", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2435576"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.7", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:L", "status": "draft"}, "cwe": "CWE-94", "details": ["No description is available for this CVE."], "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-2026-25153", "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"}], "public_date": "2026-01-30T21:31:58Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-25153\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-25153\nhttps://github.com/backstage/backstage/security/advisories/GHSA-6jr7-99pf-8vgf"], "threat_severity": "Important"}

{"analysis": {"en": {"generated_at": "2026-04-18T01:02:32.242502+00:00", "value": {"mitigation_remediation": ["Upgrade @backstage/plugin\u2011techdocs\u2011node to 1.13.11 or later (or 1.14.1 or later) and ensure @techdocs/cli uses the updated plugin. ", "Reconfigure TechDocs to run in Docker instead of local to isolate the build environment, noting that this does not fully mitigate the risk. ", "Restrict write permissions on mkdocs.yml files in source repositories, enforce pull\u2011request review requirements, and set up CI checks to reject unsupported hooks keys. ", "As a temporary measure, use a MkDocs version earlier than 1.4.0, which does not support hooks, to prevent injection."], "summary": {"action": "Patch Immediately", "impact": "Arbitrary Code Execution on Documentation Build Server"}, "threat_synthesis": {"affected_systems": "Backstage instances that use @backstage/plugin\u2011techdocs\u2011node before version 1.13.11 and before 1.14.1 are affected. These versions ship with the Backstage framework and are also used by the @techdocs/cli tool. Upgrading to version 1.13.11 or later, or to 1.14.1 or later, eliminates the vulnerability.", "description_and_impact": "The flaw is in @backstage/plugin\u2011techdocs\u2011node and allows a malicious actor who can edit a repository\u2019s mkdocs.yml file to inject arbitrary Python code that is executed during the local build of TechDocs. This grants the attacker full control of the build server where documentation is generated and can lead to compromise of the host system. The weakness is a code injection flaw (CWE\u201194).", "risk_and_exploitability": "The vulnerability carries a CVSS score of 7.7 with an EPSS of less than 1%, and it is not listed in the CISA KEV catalog. The likely attack vector requires the attacker to add or alter a mkdocs.yml file in a repository that TechDocs processes; if the build is run locally, the injected hooks code runs with the privileges of the build service. The risk is that an attacker who can modify repository content or influence pull requests can cause arbitrary code execution on the build server. Although running TechDocs in Docker mitigates process isolation, it does not fully eliminate the possibility of code injection. The risk is therefore significant for environments where local builds are performed and where repository write access is not tightly controlled."}}}}, "created": "2026-02-02T09:26:46.061563+00:00", "updated": "2026-04-18T01:15:05.978119+00:00", "vendors": ["backstage", "backstage$PRODUCT$backstage"]}