GitHub Advisoryadvisory · PyPI

GHSA-mc4f-r875-v87w Apache Airflow: Unsafe Deserialization via Legacy Serialization Keys (__type/__var) Bypass in XCom API

HIGH Published 2026-04-13 Modified 2026-06-05 Official page ↗
Aliases
CVE-2026-33858
Ecosystem
PyPI
Packages
apache-airflow
Severity
High
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weaknesses
CWE-502
Reviewed
2026-04-14

Affected packages

• PyPI apache-airflow: >= 3.1.8, < 3.2.0 → fixed in 3.2.0

Description

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.

Related

Alias · CVE (1)

  • CVE-2026-33858 Dag Authors, who normally should not be able to execute code in the webserver context could craft XCom payload causing the webserver to… vulnerability

Weakness · CWE (1)

  • CWE-502 Deserialization of Untrusted Data weakness

References