{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:linuxfoundation:backstage:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "086F7DE4-8356-4AE3-9E29-B852A5C4B2DB",
              "versionEndExcluding": "1.13.11",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:linuxfoundation:backstage:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "0393AC7C-1889-4869-ABAF-1C5D96CA2C06",
              "versionEndExcluding": "1.14.1",
              "versionStartIncluding": "1.14.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Backstage is an open framework for building developer portals, and @backstage/plugin-techdocs-node provides common node.js functionalities for TechDocs. In versions of @backstage/plugin-techdocs-node prior to 1.13.11 and 1.14.1, when TechDocs is configured with `runIn: local`, a malicious actor who can submit or modify a repository\u0027s `mkdocs.yml` file can execute arbitrary Python code on the TechDocs build server via MkDocs hooks configuration. @backstage/plugin-techdocs-node versions 1.13.11 and 1.14.1 contain a fix. The fix introduces an allowlist of supported MkDocs configuration keys. Unsupported configuration keys (including `hooks`) are now removed from `mkdocs.yml` before running the generator, with a warning logged to indicate which keys were removed. Users of `@techdocs/cli` should also upgrade to the latest version, which includes the fixed `@backstage/plugin-techdocs-node` dependency. Some workarounds are available. Configure TechDocs with `runIn: docker` instead of `runIn: local` to provide container isolation, though it does not fully mitigate the risk. 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 \u003c 1.4.0 (e.g., 1.3.1) which does not support hooks. Note: This may limit access to newer MkDocs features. Building documentation in CI/CD pipelines using `@techdocs/cli` does not mitigate this vulnerability, as the CLI uses the same vulnerable `@backstage/plugin-techdocs-node` package."
    },
    {
      "lang": "es",
      "value": "Backstage es un framework abierto para construir portales de desarrolladores, y @backstage/plugin-techdocs-node proporciona funcionalidades comunes de node.js para TechDocs. En versiones de @backstage/plugin-techdocs-node anteriores a 1.13.11 y 1.14.1, cuando TechDocs est\u00e1 configurado con \u0027runIn: local\u0027, un actor malicioso que puede enviar o modificar el archivo \u0027mkdocs.yml\u0027 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 \u0027hooks\u0027) ahora se eliminan de \u0027mkdocs.yml\u0027 antes de ejecutar el generador, con una advertencia registrada para indicar qu\u00e9 claves se eliminaron. Los usuarios de \u0027@techdocs/cli\u0027 tambi\u00e9n deben actualizar a la \u00faltima versi\u00f3n, que incluye la dependencia corregida de \u0027@backstage/plugin-techdocs-node\u0027. Algunas soluciones alternativas est\u00e1n disponibles. Configure TechDocs con \u0027runIn: docker\u0027 en lugar de \u0027runIn: local\u0027 para proporcionar aislamiento de contenedor, aunque no mitiga completamente el riesgo. Limite qui\u00e9n puede modificar los archivos \u0027mkdocs.yml\u0027 en los repositorios que TechDocs procesa; solo permita colaboradores de confianza. Implemente requisitos de revisi\u00f3n de PR para cambios en los archivos \u0027mkdocs.yml\u0027 para detectar configuraciones maliciosas de \u0027hooks\u0027 antes de que se fusionen. Use MkDocs \u0026lt; 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 \u0027@techdocs/cli\u0027 no mitiga esta vulnerabilidad, ya que la CLI utiliza el mismo paquete vulnerable de \u0027@backstage/plugin-techdocs-node\u0027."
    }
  ],
  "id": "CVE-2026-25153",
  "lastModified": "2026-02-19T15:26:37.430",
  "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"
      }
    ]
  },
  "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"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-94"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
  ]
}