GitHub Advisoryadvisory · PyPI

GHSA-r7vr-m4jw-r794 Apache Airflow has an authorization bypass in DagRun wait endpoint

MEDIUM Published 2026-04-09 Modified 2026-06-05 Official page ↗
Aliases
CVE-2026-34538
Ecosystem
PyPI
Packages
apache-airflow
Severity
Moderate
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Weaknesses
CWE-668
Reviewed
2026-04-10

Affected packages

• PyPI apache-airflow: >= 3.0.0, < 3.2.0 → fixed in 3.2.0

Description

Apache Airflow versions 3.0.0 through 3.1.8 DagRun wait endpoint returns XCom result values even to users who only have DAG Run read permissions, such as the Viewer role.This behavior conflicts with the FAB RBAC model, which treats XCom as a separate protected resource, and with the security model documentation that defines the Viewer role as read-only. Airflow uses the FAB Auth Manager to manage access control on a per-resource basis. The Viewer role is intended to be read-only by default, and the security model documentation defines Viewer users as those who can inspect DAGs without accessing sensitive execution results. Users are recommended to upgrade to Apache Airflow 3.2.0 which resolves this issue.

Related

Alias · CVE (1)

  • CVE-2026-34538 Apache Airflow versions 3.0.0 through 3.1.8 DagRun wait endpoint returns XCom result values even to users who only have DAG Run read… vulnerability

Weakness · CWE (1)

  • CWE-668 Exposure of Resource to Wrong Sphere weakness

References