What is CVE-2026-40690?

CVE-2026-40690 is a medium-severity vulnerability in Apache Airflow, classified under CWE-1220. CVSS score: 4.3/10. Published 2026-04-24.

How severe is CVE-2026-40690?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Vulnerability in Apache Airflow

CVE-2026-40690

The asset dependency graph did not restrict nodes by the viewer's DAG read permissions: a user with read access to at least one DAG could browse the asset graph for any other asset in the deployment and learn the existence and names of DAGs and assets outside their authorized scope. Users are recommended to upgrade to version 3.2.1, which fixes this issue.

Published 2026-04-24 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.006 (45.0th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 45th percentile — 45.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.006 · change: +0.002

Affected products

Apache Airflow
Apache Software Foundation Airflow — versions 0

Weakness classification (CWE)

CWE-1220

References

github.com/apache/airflow/pull/65273 (Patch, patch, Issue Tracking)
lists.apache.org/thread/bqt7y4g2cpj396b0sd20lv510ff19ndl (vendor-advisory, Mailing List, Vendor Advisory)
af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2026-40690?: CVE-2026-40690 is a medium-severity vulnerability in Apache Airflow, classified under CWE-1220. CVSS score: 4.3/10. Published 2026-04-24.
How severe is CVE-2026-40690?: Medium severity. CVSS v3 base score is 4.3 out of 10.