CVE-2026-75156: Apache Airflow FAB provider: FAB Azure AD OAuth: id_token issuer/audience not validated — cross-tenant authentication bypass
Apache Airflow FAB provider flaw (CVE-2026-75156) lets attackers bypass Azure AD OAuth token validation via unvalidated issuer and audience claims.
Apache Airflow FAB provider versions 3.7.3 through 3.8.0 do not validate the issuer or audience of Azure AD id_tokens during OAuth login, enabling cross-tenant authentication bypass. The issue affects deployments where the FAB auth manager is configured with Azure AD as an OAuth provider. A fix is available in version 3.8.1. Severity is rated moderate.