[<prev] [day] [month] [year] [list]
Message-ID: <2acf7656-23bd-438e-36e7-c88c31cfdeb4@apache.org>
Date: Thu, 09 Apr 2026 08:57:57 +0000
From: Rahul Vats <rahulvats@...che.org>
To: oss-security@...ts.openwall.com
Subject: CVE-2026-34538: Apache Airflow: Authorization bypass in DagRun
wait endpoint (XCom exposure)
Severity: low
Affected versions:
- Apache Airflow (apache-airflow) 3.0.0 before 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.
Credit:
selen (finder)
Kevin Yang (remediation developer)
References:
https://github.com/apache/airflow/pull/64415
https://airflow.apache.org/
https://www.cve.org/CVERecord?id=CVE-2026-34538
Powered by blists - more mailing lists
Please check out the
Open Source Software Security Wiki, which is counterpart to this
mailing list.
Confused about mailing lists and their use?
Read about mailing lists on Wikipedia
and check out these
guidelines on proper formatting of your messages.
