{"id":"CVE-2026-76186","published":"2026-09-16T10:16:52.793","lastModified":"2026-09-18T14:26:45.073","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.\n\nAffects 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.\n\nUsers 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.","cvssScore":9.1,"cvssSeverity":"CRITICAL","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","cwes":["CWE-565"],"vendors":["apache"],"products":["apache-airflow-providers-keycloak"],"references":[{"url":"https://github.com/apache/airflow/pull/72207","tags":["Patch","Vendor Advisory"]},{"url":"https://lists.apache.org/thread/5cqh5ojl3718ogb0q1dcd9vdr47z7gp3","tags":["Mailing List","Vendor Advisory"]},{"url":"https://lists.apache.org/thread/5cqh5ojl3718ogb0q1dcd9vdr47z7gp3?users@airflow.apache.org","tags":["Mailing List","Vendor Advisory"]},{"url":"http://www.openwall.com/lists/oss-security/2026/09/15/8","tags":["Mailing List","Vendor Advisory"]}],"exploitRefs":[{"url":"https://github.com/apache/airflow/pull/72207","tags":["Patch","Vendor Advisory"]}],"hasPoc":true,"ai":{"summary":"The flaw allows an attacker to pair a valid Airflow session token with another user's Keycloak access or refresh token, granting unauthorized access and privileges.","exploitability":"Exploitation requires access to a valid Airflow session token and another user's Keycloak token. The attacker must obtain the Keycloak token out of band.","blast_radius":"If exploited, this could lead to unauthorized access and actions performed under the attacker's Airflow session identity, potentially compromising sensitive data and operations.","remediation":"Upgrade to apache-airflow-providers-keycloak version 0.10.0 or later.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["auth-bypass","session-token","keycloak","airflow"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-09-29T09:08:38.305Z"}}