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TI-2026-53294 Aliases CVE-2026-76187GHSA-rwpr-5hxh-f9cm

Apache Airflow Keycloak provider: Any realm client's credentials mint an Airflow session JWT

Priority MEDIUM 51CWE-287Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-287.

Summary

Apache Airflow Keycloak provider: the unauthenticated token endpoint accepts a client-credentials grant for any confidential client registered in the Keycloak realm, not only the client configured for Airflow. No allowlist restricts which client ids may authenticate, so the credentials of an unrelated application that happens to share the realm are valid Airflow login credentials, and Airflow mints a signed session token for that application's service account. The endpoint also answers unauthenticated credential guesses against Keycloak under Airflow's identity. Affects deployments using the Keycloak auth manager whose realm is shared with other confidential clients. The attacker needs valid credentials for any one of those clients, not for Airflow. Resource authorization is still evaluated per subject, so the access gained is whatever that service account holds, plus any endpoint gated only on being authenticated. Users of apache-airflow-providers-keycloak are recommended to upgrade to version 0.10.0 or later, which accepts only the configured client on that grant.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00977 62nd percentileScored 2026-11-07
Fix Fixed Apache Airflow Keycloak provider (Apache Software Foundation): 0.10.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ApacheApache Airflow Keycloak providerbefore 0.10.00.10.0Patch availableCNA
  • Apache Airflow Keycloak provider VendorApache Affected before 0.10.0 Fixed in 0.10.0 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:apache:apache-airflow-providers-keycloak:*:*:*:*:*:*:*:*before 0.10.0VulnerableApache
  • cpe:2.3:a:apache:apache-airflow-providers-keycloak:*:*:*:*:*:*:*:* Versions before 0.10.0 Vulnerable ·Apache

Remediation

  • Fix · CNA Apache Airflow Keycloak provider (Apache Software Foundation) Fixed in 0.10.0

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    Apache Airflow Keycloak provider — lists.apache.org/thread/5cqh5ojl3718ogb0q1dcd9vdr47z7gp3

    2 records Highest priority Priority MEDIUM 2 MEDIUM

    Other records, highest priority first

    • TI-2026-53293 Apache Airflow Keycloak provider: Keycloak token cookies not bound to Airflow session identityPriority MEDIUM 49
    Show all 2 records → Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-76187
  2. 2026-10-03 Alias added: GHSA-rwpr-5hxh-f9cm

References

Patch 1

Advisory 3

  • TI-2026-53293 Apache Airflow Keycloak provider: Keycloak token cookies not bound to Airflow session identity CVSS 3.1CRITICAL 9.1
  • TI-2026-29599 Apache Airflow Providers Keycloak: OAuth Login CSRF — Missing State Parameter in Keycloak Auth Manager CVSS 3.1MEDIUM 5.4

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences