{"affected":[{"defaultStatus":"unaffected","ecosystem":"pypi","packageName":"apache-airflow-core","product":"Apache Airflow","source":"CNA: apache","vendor":"Apache Software Foundation","versions":[{"lessThan":"3.4.0","status":"affected","version":"0","versionType":"semver"}]}],"cveId":"CVE-2026-86829","cwes":["CWE-502"],"description":"Apache Airflow's scheduler fully deserializes XCom values written by task code while evaluating task dependencies. A Dag author, who controls what a task writes to XCom, therefore controls data that is deserialized inside the scheduler process - a context the Airflow security model reserves for code installed by the Deployment Manager, above the worker-scoped execution capability a Dag author is documented to have. Deployments that treat Dag authors as less trusted than Deployment Managers are affected, and the scheduler must be evaluating a task dependency that reads a task-written XCom value. Users of apache-airflow are recommended to upgrade to version 3.4.0 or later, which restricts dependency evaluation to primitive XCom values.","epss":null,"exploits":[],"kev":null,"metrics":[],"modifiedAt":1794219199317,"publishedAt":1794217964345,"references":[{"source":"CNA: apache","tags":["patch"],"url":"https://github.com/apache/airflow/pull/72718"},{"source":"CNA: apache","tags":["vendor-advisory"],"url":"https://lists.apache.org/thread.html/2qbt7qnclrlxtg3f1b685533r3mvk9hv"},{"source":"ADP: CVE","tags":[],"url":"http://www.openwall.com/lists/oss-security/2026/11/09/9"}],"remediation":[{"kind":"fix","source":"CNA: apache","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://github.com/apache/airflow/pull/72718"}],"revision":"c92534e1bce48889e098afd7d753f656a6f7758383eb72b00230f48ed0e944bf","sources":[{"modifiedAt":1794219199317,"name":"CNA: apache","retrievedAt":1794222554760,"url":"https://www.cve.org/CVERecord?id=CVE-2026-86829"}],"ssvc":null,"status":"published","title":"Apache Airflow: Deserialization of task-controlled XCom values in the Scheduler during dependency evaluation","updatedAt":1794222554760}