Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Jupyter | Oauthenticator | < 17.4.0 |
Related Weaknesses (CWE)
References
- https://github.com/jupyterhub/oauthenticator/commit/f0c7002dc36e41efae0f674033cfPatch
- https://github.com/jupyterhub/oauthenticator/releases/tag/17.4.0Product
- https://github.com/jupyterhub/oauthenticator/security/advisories/GHSA-rrvg-cxh4-MitigationVendor Advisory
FAQ
What is CVE-2026-33175?
CVE-2026-33175 is a vulnerability with a CVSS score of 8.8 (HIGH). 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 ...
How severe is CVE-2026-33175?
CVE-2026-33175 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-33175?
Check the references section above for vendor advisories and patch information. Affected products include: Jupyter Oauthenticator.