How severe is CVE-2026-40961?

CVE-2026-40961 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-40961 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-40961?

CVE-2026-40961 affects Apache Airflow. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-40961?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-40961 have an EU (EUVD) identifier?

Yes. CVE-2026-40961 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-33597.

When was CVE-2026-40961 published?

CVE-2026-40961 was published on 2026-06-01 and last updated on 2026-06-17.

CVE-2026-40961

CVE-2026-40961 is a high-severity vulnerability in Apache Airflow with a CVSS 3.x base score of 7.2. 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-601.

Key facts

Severity: High (CVSS 3.x base score 7.2)
EPSS exploit prediction: 1% (46th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-33597
Weakness: CWE-601
Affected product: Apache Airflow
Published: 2026-06-01
Last modified: 2026-06-17

Description

A bug in the login redirect route in Apache Airflow allowed authenticated users to craft URLs that bypassed the `is_safe_url` check, enabling redirection from a trusted Airflow domain to an attacker-controlled origin. Users are advised to upgrade to `apache-airflow` 3.2.2 or later. As a defense-in-depth mitigation, deployment operators can place Airflow behind a reverse proxy that strips off-domain `next=` query parameters before they reach the login endpoint.

Frequently asked questions

What is CVE-2026-40961?: A bug in the login redirect route in Apache Airflow allowed authenticated users to craft URLs that bypassed the `is_safe_url` check, enabling redirection from a trusted Airflow domain to an attacker-controlled origin. Users are advised to upgrade to `apache-airflow` 3.2.2 or later. As a defense-in-depth mitigation, deployment operators can place Airflow behind a reverse proxy that strips off-domain `next=` query parameters before they reach the login endpoint.
How severe is CVE-2026-40961?: CVE-2026-40961 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-40961 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-40961?: CVE-2026-40961 affects Apache Airflow. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-40961?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-40961 have an EU (EUVD) identifier?: Yes. CVE-2026-40961 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-33597.
When was CVE-2026-40961 published?: CVE-2026-40961 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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