EUVD-2026-20878
GHSA-r7vr-m4jw-r794
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Lifecycle Timeline
4Description
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.
Analysis
Apache Airflow 3.0.0 through 3.1.8 discloses XCom result values to users with only DAG Run read permissions (such as Viewer role), violating the FAB RBAC model that treats XCom as a protected resource. This information disclosure affects authenticated users and allows them to access sensitive execution results they should not be able to view. …
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