CVEvulnerability

CVE-2026-33175

8.8 HIGH Published 2026-04-03 Modified 2026-07-24 Official page ↗

Status: Analyzed
Published: 2026-04-03
Last modified: 2026-07-24
Assigner: [email protected]
CVSS 3.1 ([email protected]): 8.8 HIGH — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weaknesses: CWE-287, CWE-290

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 configurations

• jupyter oauthenticator (< 17.4.0)

Weakness · CWE (2)

CWE-287 Improper Authentication weakness
CWE-290 Authentication Bypass by Spoofing weakness

References

https://github.com/jupyterhub/oauthenticator/commit/f0c7002dc36e41efae0f674033cf7888a21d96f9 Patch
https://github.com/jupyterhub/oauthenticator/releases/tag/17.4.0 Product
https://github.com/jupyterhub/oauthenticator/security/advisories/GHSA-rrvg-cxh4-qhrv Mitigation, Vendor Advisory

CVE-2026-33175

Description

Affected configurations

Related

Weakness · CWE (2)

References