Code Injection in Apache Airflow - CVE-2026-33264
Published: August 24, 2026
Vulnerability identifier: #VU144863
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-33264
CWE-ID: CWE-94
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to execute arbitrary code.
The vulnerability exists due to improper control of code generation in BaseSerialization.deserialize() when loading a serialized DAG containing an attacker-controlled class path. A remote user can embed a malicious trigger into a DAG to execute arbitrary code.
The issue crosses the Airflow security boundary by allowing DAG-author code to run in the API Server or Scheduler process.
Affected software
Apache Airflow
How to mitigate CVE-2026-33264
Install security update from vendor's website.
Apache Airflow - update to 3.3.0