CVE-2026-49757 OAuth2/OIDC account takeover in AshAuthentication via email-based user matching

Authentication Bypass by Spoofing vulnerability in team-alembic AshAuthentication allows account takeover of local users via OAuth2/OIDC sign-in. AshAuthentication's OAuth2 and OIDC family strategies matched the local user by email address an upsert on the email field, or a user-defined sign-in...

EEF-CVE-2026-49757 OAuth2/OIDC account takeover in AshAuthentication via email-based user matching

Summary Authentication Bypass by Spoofing vulnerability in team-alembic AshAuthentication allows account takeover of local users via OAuth2/OIDC sign-in. AshAuthentication's OAuth2 and OIDC family strategies matched the local user by email address an upsert on the email field, or a user-defined...

PT-2025-6376 · Unknown · Ashauthentication

Name of the Vulnerable Software and Affected Versions: AshAuthentication versions 4.1.0 through 4.4.8 Description: The issue affects applications that have been bootstrapped by the new igniter installer since AshAuthentication v4.1.0 and have used the magic link strategy or are manually revoking...