EUVD-2026-18878

Auth0OAuthenticator has an Authentication Bypass via Unverified Email Claims...

Auth0OAuthenticator has an Authentication Bypass via Unverified Email Claims

Summary An authentication bypass vulnerability in oauthenticator allows an attacker with an unverified email address on an Auth0 tenant to login to JupyterHub. When email is used as the usrnameclaim, this gives users control over their username and the possibility of account takeover. Impact This...