CVE-2026-76187

9.8 CRITICALpublic exploit available

Published 2026-09-16 · Updated 2026-09-18

AI risk analysis

Summary: The flaw allows unauthenticated access to the token endpoint of Apache Airflow Keycloak provider, accepting any client credentials from the realm, leading to potential unauthorized access using another application's service account.
Exploitability: Exploitation is relatively easy if an attacker has valid credentials for any confidential client in the shared Keycloak realm.
Blast radius: If exploited, this could grant attackers access with the permissions of the unrelated application’s service account, impacting resource security and integrity.
Prioritized remediation: Upgrade to Apache Airflow providers keycloak version 0.10.0 or later to restrict token endpoint access to only the configured client.

auth-bypasswebairflowkeycloakunauthorized-access

Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.

NVD description

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.

CVSS vector

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

Weaknesses

CWE-287

Vendors

apache

Products

apache-airflow-providers-keycloak

Public exploit & PoC references

https://github.com/apache/airflow/pull/72205[Patch, Vendor Advisory]

All references

Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.

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