CVE-2026-40861

{"id": "CVE-2026-40861", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-40861", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-06-02T16:33:03.378849Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 3.6, "exploitabilityScore": 2.8}]}, "affected": [{"source": "security@apache.org", "affectedData": [{"vendor": "Apache Software Foundation", "product": "Apache Airflow", "versions": [{"status": "affected", "version": "0", "lessThan": "3.2.2", "versionType": "semver"}], "packageName": "apache-airflow", "collectionURL": "https://pypi.python.org", "defaultStatus": "unaffected"}]}], "published": "2026-06-01T09:16:17.893", "references": [{"url": "https://github.com/apache/airflow/pull/65325", "tags": ["Issue Tracking", "Patch"], "source": "security@apache.org"}, {"url": "https://lists.apache.org/thread/823334db2559xjlwt59gpzjz47thnscl", "tags": ["Mailing List", "Vendor Advisory"], "source": "security@apache.org"}, {"url": "http://www.openwall.com/lists/oss-security/2026/05/31/1", "tags": ["Mailing List", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security@apache.org", "description": [{"lang": "en", "value": "CWE-59"}]}], "descriptions": [{"lang": "en", "value": "A Dag author could either (a) create a symlink under their task's log directory pointing to an arbitrary file readable by the API server process (read-path attack \u2014 e.g. `/etc/passwd` or `airflow.cfg`) or (b) supply a `task_id` containing `..` sequences accepted by the Task SDK's `KEY_REGEX` (write-path attack), and in both cases the FileTaskHandler resolves the log path outside the configured `base_log_folder`, leaking or overwriting arbitrary files. Only affects deployments where the worker log folder is shared with the API server. Users are advised to upgrade to `apache-airflow` 3.2.2 or later. As a defense-in-depth mitigation, deploy the worker and API server with separate log volumes so that worker-controlled paths cannot reach the API server's filesystem."}, {"lang": "es", "value": "Un autor de Dag podr\u00eda (a) crear un enlace simb\u00f3lico bajo el directorio de logs de su tarea apuntando a un archivo arbitrario legible por el proceso del servidor API (ataque de ruta de lectura - p. ej. '/etc/pass1d' o 'airflow.cfg') o (b) proporcionar un 'task_id' que contenga secuencias '..' aceptadas por el 'KEY_REGEX' del SDK de Tareas (ataque de ruta de escritura), y en ambos casos el FileTaskHandler resuelve la ruta del log fuera de la 'base_log_folder' configurada, filtrando o sobrescribiendo archivos arbitrarios. Solo afecta a despliegues donde la carpeta de logs del worker es compartida con el servidor API. Se aconseja a los usuarios actualizar a 'apache-airflow' 3.2.2 o posterior. Como mitigaci\u00f3n de defensa en profundidad, despliegue el worker y el servidor API con vol\u00famenes de log separados para que las rutas controladas por el worker no puedan alcanzar el sistema de archivos del servidor API."}], "lastModified": "2026-07-21T19:10:00.107", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:apache:airflow:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0893C3AA-26A4-4682-A36C-05E719EB2943", "versionEndExcluding": "3.2.2"}], "operator": "OR"}]}], "sourceIdentifier": "security@apache.org"}