What is CVE-2026-40963?

CVE-2026-40963 is a low-severity vulnerability in Apache Airflow, classified under Improper Authorization. CVSS score: 3.1/10. Published 2026-06-01.

How severe is CVE-2026-40963?

Low severity. CVSS v3 base score is 3.1 out of 10.

Auth bypass in Apache Airflow

CVE-2026-40963

The structure_data endpoint in the Airflow UI returned external dependency graph nodes for linked Dags without checking whether the caller had read permission on those linked Dags. An authenticated UI/API user authorized for one Dag could…

EPSS: 0.000 (14.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 3.1 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N.

Affected products

Apache Airflow
Apache Software Foundation Airflow — versions 3.0.0

Weakness classification (CWE)

CWE-285 — Improper Authorization

References

security@apache.org (Patch, patch, Issue Tracking)
security@apache.org (vendor-advisory, Mailing List, Vendor Advisory)
af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2026-40963?: CVE-2026-40963 is a low-severity vulnerability in Apache Airflow, classified under Improper Authorization. CVSS score: 3.1/10. Published 2026-06-01.
How severe is CVE-2026-40963?: Low severity. CVSS v3 base score is 3.1 out of 10.