OCTOBER 7, 2026
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Case File

CVE-2026-76186

CRITICAL · CVSS 9.1 EPSS 0.81% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-09-16 · Last synced 2026-10-07

CyberRota Analysis

AI-Generated

Apache Airflow versions 3.3 and later, utilizing the Keycloak authentication manager, are vulnerable due to a flaw where Keycloak access and refresh tokens are stored in separate, unauthenticated cookies, allowing attackers to exploit mismatched tokens. This vulnerability enables an authenticated user to impersonate another user by pairing their session with a foreign token, potentially granting unauthorized access to resources and actions. Organizations using Airflow with Keycloak should prioritize upgrading to version 0.10.0 or later to mitigate this risk.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

GitHub PoC Links

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-76186
Severity
CRITICAL
CVSS
9.1
EPSS
0.81%
Apache

Original NVD Description

Apache Airflow Keycloak provider: from Airflow 3.3 the Keycloak auth manager takes a user's identity from the signed Airflow session token but takes the Keycloak access and refresh tokens used for every authorization decision from separate, unauthenticated cookies, and never checks that the two describe the same subject. A user who holds any valid Airflow login of their own, together with another subject's Keycloak access or refresh token obtained out of band, can pair the two: Airflow then authorizes requests with the foreign token's privileges while the session identity, audit log and cache keys continue to name the attacker's own account. The refresh path re-issues an Airflow session token for the original identity carrying the foreign tokens, so the mismatched pairing survives across sessions. Affects deployments running Airflow 3.3 or later with the Keycloak auth manager. Earlier versions carried the Keycloak tokens inside the signed session token, so the binding existed and was lost when they moved into separate cookies. Users of apache-airflow-providers-keycloak are recommended to upgrade to version 0.10.0 or later, which binds the cookie-supplied tokens to the session identity.

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