Skip to content
CVE PROGRAM SOURCE RECORD8.8 High

CVE-2026-33175

OAuthenticator: Authentication Bypass in Auth0OAuthenticator via Unverified Email Claims

Description

OAuthenticator is software that allows OAuth2 identity providers to be plugged in and used with JupyterHub. Prior to version 17.4.0, 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 usrname_claim, this gives users control over their username and the possibility of account takeover. This issue has been patched in version 17.4.0.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

jupyterhub oauthenticator

  • < 17.4.0affected

References