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