CVE-2026-42359

{"id": "CVE-2026-42359", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-42359", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-06-02T03:55:43.691388Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.8, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 2.8}]}, "affected": [{"source": "security@apache.org", "affectedData": [{"vendor": "Apache Software Foundation", "product": "Apache Airflow", "versions": [{"status": "affected", "version": "3.2.0", "lessThan": "3.2.2", "versionType": "semver"}], "packageName": "apache-airflow", "collectionURL": "https://pypi.python.org", "defaultStatus": "unaffected"}]}], "published": "2026-06-01T09:16:18.907", "references": [{"url": "https://github.com/apache/airflow/pull/65915", "tags": ["Issue Tracking", "Patch"], "source": "security@apache.org"}, {"url": "https://lists.apache.org/thread/g8dqykpf1p90tysq8tln4qtkqwb1038s", "tags": ["Mailing List", "Vendor Advisory"], "source": "security@apache.org"}, {"url": "https://www.cve.org/CVERecord?id=CVE-2026-33858", "tags": ["Third Party Advisory"], "source": "security@apache.org"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security@apache.org", "description": [{"lang": "en", "value": "CWE-502"}]}], "descriptions": [{"lang": "en", "value": "A bug in Apache Airflow's XCom PATCH endpoint `PATCH /api/v2/xcomEntries/{key}` allowed an authenticated UI/API user with XCom write permission on a Dag to set XCom entries under reserved key names (e.g. `return_value`) that the matching POST endpoint already validated against `FORBIDDEN_XCOM_KEYS`. The endpoint also accepted serialized payload shapes the triggerer's deserializer treats as code; combined, this allowed RCE on the triggerer when the affected task next deferred. Affects deployments where untrusted users have XCom write permission on Dags that defer to the triggerer. This is a fix-bypass of CVE-2026-33858: PR #64148 added the `FORBIDDEN_XCOM_KEYS` validator only on the POST/set path; the PATCH path was not covered. Users who already upgraded for CVE-2026-33858 should additionally upgrade to `apache-airflow` 3.2.2 or later to cover the PATCH-path bypass."}, {"lang": "es", "value": "Un error en el endpoint PATCH de XCom de Apache Airflow 'PATCH /api/v2/xcomEntries/{key}' permiti\u00f3 a un usuario autenticado de UI/API con permiso de escritura de XCom en un Dag establecer entradas de XCom bajo nombres de clave reservados (por ejemplo, 'return_value') que el endpoint POST correspondiente ya validaba contra 'FORBIDDEN_XCOM_KEYS'. El endpoint tambi\u00e9n aceptaba formas de carga \u00fatil serializadas que el deserializador del disparador trata como c\u00f3digo; combinado, esto permiti\u00f3 RCE en el disparador cuando la tarea afectada se aplaz\u00f3 a continuaci\u00f3n. Afecta a implementaciones donde usuarios no confiables tienen permiso de escritura de XCom en Dags que se aplazan al disparador. Esto es un bypass de la correcci\u00f3n de CVE-2026-33858: PR #64148 a\u00f1adi\u00f3 el validador 'FORBIDDEN_XCOM_KEYS' solo en la ruta POST/set; la ruta PATCH no estaba cubierta. Los usuarios que ya actualizaron para CVE-2026-33858 deber\u00edan actualizar adicionalmente a 'apache-airflow' 3.2.2 o posterior para cubrir el bypass de la ruta PATCH."}], "lastModified": "2026-07-21T19:10:00.107", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:apache:airflow:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D170BE0B-8FB0-455D-B886-AEA5677D12A8", "versionEndExcluding": "3.2.2", "versionStartIncluding": "3.2.0"}], "operator": "OR"}]}], "sourceIdentifier": "security@apache.org"}