PT-2026-140276

CVE-2026-111421

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Published

2026-11-09

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Updated

2026-11-09

Description by

CVSS 3.1
8.8
High
MetricsAV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Name of the Vulnerable Software and Affected Versions Apache Airflow versions prior to 3.4.0
Description The Task Execution API stores XCom values written by a task without applying the reserved-key check. This allows a DAG author to write an XCom that, when viewed via the API with deserialization enabled, forces the API server to instantiate classes from the airflow.* namespace using arguments selected by the author.
Recommendations Upgrade to Apache Airflow version 3.4.0 or later.
Exploitability
Fix
Impacts
Researchers
Vendors
Affected products
Weakness enumeration
CWE-502: Deserialization of Untrusted Data
Related identifiers
CVE-2026-111421
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