CVE-2026-33858

HIGH 8.8

Apache Airflow: Unsafe Deserialization via Legacy Serialization Keys (type/var) Bypass in XCom API

CVSS Score

8.8

EPSS Score

0.0%

EPSS Percentile

0th

Dag Authors, who normally should not be able to execute code in the webserver context could craft XCom payload causing the webserver to execute arbitrary code. Since Dag Authors are already highly trusted, severity of this issue is Low. Users are recommended to upgrade to Apache Airflow 3.2.0, which resolves this issue.

CWE	CWE-502
Vendor	apache software foundation
Product	apache airflow
Published	Apr 13, 2026
Last Updated	Apr 14, 2026

Stay Ahead of the Next One

Get instant alerts for apache software foundation apache airflow

Be the first to know when new high vulnerabilities affecting apache software foundation apache airflow are published — delivered to Slack, Telegram or Discord.

Get Free Alerts → Free · No credit card · 60 sec setup

Affected Versions

Apache Software Foundation / Apache Airflow

3.1.8 < 3.2.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/apache/airflow/pull/64148 lists.apache.org: https://lists.apache.org/thread/1npt3o2x81s0gw9tmfcv4n7p1z9hdmy0 openwall.com: http://www.openwall.com/lists/oss-security/2026/04/13/7

Credits

wooseokdotkim Amogh Desai