CVE-2026-59245: Apache Airflow FAB provider: FAB auth manager: a DAG named "DAGs" hijacks the global all-DAGs permission (access_control privilege escalation via resource_name() collision)

[Vincent Beck <vincbeck () apache org>]

Severity: moderate 

Affected versions:

- Apache Airflow FAB provider (apache-airflow-providers-fab) before 3.7.2

Description:

In the Apache Airflow FAB auth manager, a DAG whose `dag_id` is `DAGs` collided with the global all-DAGs permission 
resource name produced by `resource_name()`, so a user granted per-DAG `access_control` on that one DAG was silently 
granted the global all-DAGs permission (privilege escalation). The escalation triggers when a DAG named `DAGs` exists 
and a lower-privileged user is given per-DAG access to it, granting that user read/edit access to every DAG. Users are 
advised to upgrade to `apache-airflow-providers-fab` 3.7.2 or later, which disambiguates the resource-name collision.

Credit:

Tran Hieu (h1tr3xnull) (finder)
Jarek Potiuk (remediation developer)

References:

https://github.com/apache/airflow/pull/69106
https://airflow.apache.org/
https://www.cve.org/CVERecord?id=CVE-2026-59245