Apache Airflow: Open Redirect Bypass Vulnerability

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Summary

CVECVE-2026-40961
StatePUBLISHED
Assignerapache
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-01 09:16:18 UTC
Updated2026-06-02 18:49:33 UTC
DescriptionA 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.

Risk And Classification

Primary CVSS: v3.1 7.2 HIGH from ADP

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

EPSS: 0.000150000 probability, percentile 0.035270000 (date 2026-06-02)

Problem Types: CWE-601 | CWE-601 CWE-601: URL Redirection to Untrusted Site (Open Redirect)

VersionSourceTypeScoreSeverityVector
3.1ADPDECLARED7.2HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary7.2HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Apache Airflow All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Apache Software Foundation Apache Airflow affected 3.0.0 3.2.2 semver Not specified

References

ReferenceSourceLinkTags
github.com/apache/airflow/pull/65557 [email protected] github.com Issue Tracking, Patch
www.openwall.com/lists/oss-security/2026/05/31/2 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com Mailing List, Third Party Advisory
lists.apache.org/thread/qmt8ksh7gty6b8hr9w294t94j36jdv1q [email protected] lists.apache.org Mailing List, Vendor Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Fushuling@secsys (en)

CNA: RacerZ@secsys (en)

CNA: Aritra Basu (en)

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