CVE-2026-33175 - Vulnerability Analysis

Overview

OAuthenticator < 17.4.0 contains an authentication bypass caused by unverified email addresses on Auth0 tenants when email is used as username_claim, letting attackers login and potentially take over accounts, exploit requires unverified email on Auth0.

Severity & Score

Impact

Attackers can bypass authentication and take over user accounts, leading to unauthorized access.

Mitigation

Update to version 17.4.0 or later.

References

• https://github.com/jupyterhub/oauthenticator/commit/f0c7002dc36e41efae0f674033cf7888a21d96f9
• https://github.com/jupyterhub/oauthenticator/releases/tag/17.4.0
• https://github.com/jupyterhub/oauthenticator/security/advisories/GHSA-rrvg-cxh4-qhrv

Social Media Activity(1 post)

TheHackerWire

@thehackerwire

Apr 4, 2026

🟠 CVE-2026-33175 - High (8.8) 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... 🔗 https://www.thehackerwire.com/vulnerability/CVE-2026-33175/ #CVE #vulnerability #infosec #cybersecurity #security #Tenda #patchstack

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• Vulnerability Intelligence Dashboard
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