CVE-2026-41084CWE-639

Apache Airflow: API authorization bypass: bulk TaskInstances allows cross-DAG mutation

High · published June 1, 2026

CVSS v3.1
7.5
EPSS
1%
Percentile
54.9
In the wild
Unconfirmed
What it is

A bug in Apache Airflow's bulk Task Instances API (`PATCH/DELETE /api/v2/dags/{dag_id}/dagRuns/{dag_run_id}/taskInstances`) evaluated authorization against the `dag_id` resolved from the URL path while operating on the `dag_id` / `dag_run_id` extracted from request-body entity fields. An authenticated UI/API user with edit permission on one Dag could mutate Task Instance state in any other Dag by keeping the authorized Dag's ID in the URL path and naming the target Dag's IDs in the request body entities. Affects deployments that rely on per-Dag edit-scope to keep Task Instance state isolated between teams. Users are advised to upgrade to `apache-airflow` 3.2.2 or later.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00763 · 54.9th percentile
Weakness
CWE-639 · Authorization Bypass Through User-Controlled Key
Published
2026-06-01T07:51Z
EPSS history
Timeline
  • 01 JUN 07:51Z
    Apache Airflow: API authorization bypass: bulk TaskInstances allows cross-DAG mutation
    cvelistv5