CVE-2026-58076

{
  "id": "CVE-2026-58076",
  "sourceIdentifier": "[email protected]",
  "published": "2026-08-12T16:17:08.317",
  "lastModified": "2026-10-24T16:10:00.153",
  "vulnStatus": "Modified",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Apache Airflow's serialization layer reconstructed exception nodes by calling `import_string()` on a class name taken from the serialized blob and instantiating it with arguments from the same blob, with no restriction on what could be imported. An operator's `executor_config` reaches that branch, so a Dag author could place a value there that causes an arbitrary callable to be imported and invoked -- for example `subprocess.check_output`, or `builtins.eval` on the `builtins`-prefixed variant. The code runs in the **Scheduler**, which reconstructs serialized Dags in its normal loop with no request involved, and in the **API server**, on any authenticated read of the Dag such as `GET /api/v2/dags/{dag_id}/details`. Both are components the Airflow security model states must never execute Dag-author code, and both hold the metadata database credentials and the JWT signing secret. No non-default configuration is required. This is a **different sink from CVE-2026-33264**, which covered only the trigger branch of the same deserializer: deployments that upgraded in response to that advisory are still affected through the exception branch and must upgrade again. Users are advised to upgrade to apache-airflow 3.3.1 or later, which restricts the imported class to a subclass of `BaseException`."
    },
    {
      "lang": "es",
      "value": "La capa de serialización de Apache Airflow reconstruyó nodos de excepción llamando a “import_string()” en un nombre de clase tomado del blob serializado e instanciándolo con argumentos del mismo blob, sin restricción sobre lo que podía importarse. El “executor_config” de un operador alcanza esa rama, por lo que un autor de Dag podría colocar un valor allí que cause que un invocable arbitrario sea importado e invocado -- por ejemplo, “subprocess.check_output”, o “builtins.eval” en la variante con prefijo “builtins”. El código se ejecuta en el Scheduler, que reconstruye Dags serializados en su bucle normal sin ninguna solicitud involucrada, y en el servidor API, en cualquier lectura autenticada del Dag, como “GET /api/v2/dags/{dag_id}/details”. Ambos son componentes que el modelo de seguridad de Airflow establece que nunca deben ejecutar código de autor de Dag, y ambos poseen las credenciales de la base de datos de metadatos y el secreto de firma JWT. No se requiere ninguna configuración no predeterminada. Este es un sumidero diferente de CVE-2026-33264, que cubría solo la rama de activación del mismo deserializador: las implementaciones que se actualizaron en respuesta a ese aviso siguen afectadas a través de la rama de excepción y deben actualizarse de nuevo. Se aconseja a los usuarios actualizar a apache-airflow 3.3.1 o posterior, que restringe la clase importada a una subclase de “BaseException”."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "Apache Software Foundation",
          "product": "Apache Airflow",
          "defaultStatus": "unaffected",
          "collectionURL": "https://pypi.python.org",
          "packageName": "apache-airflow",
          "packageURL": "pkg:pypi/apache-airflow",
          "versions": [
            {
              "version": "3.0.0",
              "lessThan": "3.3.1",
              "versionType": "semver",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Primary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "baseScore": 8.8,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 5.9
      },
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "baseScore": 8.8,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 5.9
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-08-18T13:43:21.351742Z",
          "id": "CVE-2026-58076",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-502"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:apache:airflow:*:*:*:*:*:*:*:*",
              "versionStartIncluding": "3.3.0",
              "versionEndExcluding": "3.3.1",
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  "references": [
    {
      "url": "https://github.com/apache/airflow/pull/68511",
      "source": "[email protected]",
      "tags": [
        "Issue Tracking",
        "Patch"
      ]
    },
    {
      "url": "https://lists.apache.org/thread/t81p688t15jozxsng8521o60nh2kfsos",
      "source": "[email protected]",
      "tags": [
        "Mailing List",
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-33264",
      "source": "[email protected]",
      "tags": [
        "Not Applicable"
      ]
    }
  ]
}