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CVE-2026-33175

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CVE-2026-33175

Published: Apr 3, 2026

Modified: Apr 7, 2026

PUBLISHED

CVSS v3.1

8.8

HIGH

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.

VendorProductVersions

jupyterhub

oauthenticator

affected
< 17.4.0

Weaknesses (CWE)

CWE-287
CWE-290

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

References

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