How severe is CVE-2026-40963?

CVE-2026-40963 has a CVSS 3.x base score of 3.1, rated low severity. It is exploitable over network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2026-40963 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-40963?

CVE-2026-40963 affects Apache Airflow. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-40963?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-40963 have an EU (EUVD) identifier?

Yes. CVE-2026-40963 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-33596.

When was CVE-2026-40963 published?

CVE-2026-40963 was published on 2026-06-01 and last updated on 2026-06-17.

CVE-2026-40963

CVE-2026-40963 is a low-severity vulnerability in Apache Airflow with a CVSS 3.x base score of 3.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-285.

Key facts

Severity: Low (CVSS 3.x base score 3.1)
EPSS exploit prediction: 0% (37th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-33596
Weakness: CWE-285
Affected product: Apache Airflow
Published: 2026-06-01
Last modified: 2026-06-17

Description

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 enumerate linked Dag IDs and dependency metadata for other Dags they were not authorized to read. Affects deployments that rely on per-Dag read scoping to keep Dag dependency topology private across teams. Users are advised to upgrade to `apache-airflow` 3.2.2 or later.

Frequently asked questions

What is 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 enumerate linked Dag IDs and dependency metadata for other Dags they were not authorized to read. Affects deployments that rely on per-Dag read scoping to keep Dag dependency topology private across teams. Users are advised to upgrade to `apache-airflow` 3.2.2 or later.
How severe is CVE-2026-40963?: CVE-2026-40963 has a CVSS 3.x base score of 3.1, rated low severity. It is exploitable over network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2026-40963 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-40963?: CVE-2026-40963 affects Apache Airflow. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-40963?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-40963 have an EU (EUVD) identifier?: Yes. CVE-2026-40963 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-33596.
When was CVE-2026-40963 published?: CVE-2026-40963 was published on 2026-06-01 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:apache:airflow:*:*:*:*:*:*:*:*

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