CVE-2026-33858 — Apache Airflow: Unsafe Deserialization via Legacy Serialization Keys (__type/__var) Bypass in XCom API

CVE-2026-33858

Apache Airflow: Unsafe Deserialization via Legacy Serialization Keys (__type/__var) Bypass in XCom API PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
Apache Software Foundation / Apache Airflow	affected 3.1.8 before 3.2.0

CWE

CWE-502

References

https://github.com/apache/airflow/pull/64148
https://lists.apache.org/thread/1npt3o2x81s0gw9tmfcv4n7p1z9hdmy0

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.

CVE

No English description supplied.

http://www.openwall.com/lists/oss-security/2026/04/13/7