CVE-2026-58076

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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. 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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. 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{"affected": [{"affectedData": [{"collectionURL": "https://pypi.python.org", "defaultStatus": "unaffected", "packageName": "apache-airflow-core", "packageURL": "pkg:pypi/apache-airflow-core", "product": "Apache Airflow", "vendor": "Apache Software Foundation", "versions": [{"lessThan": "3.3.1", "status": "affected", "version": "3.0.0", "versionType": "semver"}]}], "source": "security@apache.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:apache:airflow:*:*:*:*:*:*:*:*", "matchCriteriaId": "F6D5F0B2-15A2-4782-8CC5-769E57D5F2F6", "versionEndExcluding": "3.3.1", "versionStartIncluding": "3.3.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "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 serializaci\u00f3n de Apache Airflow reconstruy\u00f3 nodos de excepci\u00f3n llamando a \u201cimport_string()\u201d en un nombre de clase tomado del blob serializado e instanci\u00e1ndolo con argumentos del mismo blob, sin restricci\u00f3n sobre lo que pod\u00eda importarse. El \u201cexecutor_config\u201d de un operador alcanza esa rama, por lo que un autor de Dag podr\u00eda colocar un valor all\u00ed que cause que un invocable arbitrario sea importado e invocado -- por ejemplo, \u201csubprocess.check_output\u201d, o \u201cbuiltins.eval\u201d en la variante con prefijo \u201cbuiltins\u201d. El c\u00f3digo 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 \u201cGET /api/v2/dags/{dag_id}/details\u201d. Ambos son componentes que el modelo de seguridad de Airflow establece que nunca deben ejecutar c\u00f3digo 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 configuraci\u00f3n no predeterminada. Este es un sumidero diferente de CVE-2026-33264, que cubr\u00eda solo la rama de activaci\u00f3n del mismo deserializador: las implementaciones que se actualizaron en respuesta a ese aviso siguen afectadas a trav\u00e9s de la rama de excepci\u00f3n 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 \u201cBaseException\u201d."}], "id": "CVE-2026-58076", "lastModified": "2026-11-03T07:20:55.730", "metrics": {"cvssMetricV31": [{"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": "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": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-58076", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-08-18T13:43:21.351742Z", "version": "2.0.3"}}]}, "published": "2026-08-12T16:17:08.317", "references": [{"source": "security@apache.org", "tags": ["Issue Tracking", "Patch"], "url": "https://github.com/apache/airflow/pull/68511"}, {"source": "security@apache.org", "tags": ["Mailing List", "Vendor Advisory"], "url": "https://lists.apache.org/thread/t81p688t15jozxsng8521o60nh2kfsos"}, {"source": "security@apache.org", "tags": ["Not Applicable"], "url": "https://www.cve.org/CVERecord?id=CVE-2026-33264"}], "sourceIdentifier": "security@apache.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-502"}], "source": "security@apache.org", "type": "Secondary"}]}

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