CVE-2026-86829 (GCVE-0-2026-86829)

Vulnerability from cvelistv5 – Published: 2026-11-09 09:52 – Updated: 2026-11-09 10:13
VLAI
Title
Apache Airflow: Deserialization of task-controlled XCom values in the Scheduler during dependency evaluation
Summary
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.
Severity
No CVSS data available.
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
apache CNA under the mitre root
CNA scorecard B 76/100 over 1199 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Apache Software Foundation Apache Airflow Affected: 0 , < 3.4.0 (semver)
guessed Create a notification for this product.
Credits
Claude Security Scans Jarek Potiuk
Show details on NVD website
To clipboard 

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