CVE-2026-76187 Apache Airflow - Authentication Bypass

Apache Airflow Keycloak provider contains an authentication bypass caused by unauthenticated token endpoint accepting any confidential client credentials in a shared Keycloak realm, letting attackers authenticate as any client, exploit requires valid credentials of any confidential client in the realm.

CVSS base score 9.8 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.98% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Authentication Bypass
Impact
Broken Authentication
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
16 September 2026
Updated
15 October 2026
Weakness
CWE-287

Vendor fix

Upgrade apache-airflow-providers-keycloak to version 0.10.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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