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NVD Vulnerability Details :
CVE-2026-33175
Analyzed
More InfoOfficial Page
Source-security-advisories@github.com
View Known Exploited Vulnerability (KEV) details
Published At-03 Apr, 2026 | 22:16
Updated At-15 Apr, 2026 | 18:42

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.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.18.8HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Type: Secondary
Version: 3.1
Base score: 8.8
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CPE Matches
jupyter
jupyter
>>oauthenticator>>Versions before 17.4.0(exclusive)
cpe:2.3:a:jupyter:oauthenticator:*:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-287Primarysecurity-advisories@github.com
CWE-290Primarysecurity-advisories@github.com
CWE ID: CWE-287
Type: Primary
Source: security-advisories@github.com
CWE ID: CWE-290
Type: Primary
Source: security-advisories@github.com
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://github.com/jupyterhub/oauthenticator/commit/f0c7002dc36e41efae0f674033cf7888a21d96f9security-advisories@github.com
Patch
https://github.com/jupyterhub/oauthenticator/releases/tag/17.4.0security-advisories@github.com
Product
https://github.com/jupyterhub/oauthenticator/security/advisories/GHSA-rrvg-cxh4-qhrvsecurity-advisories@github.com
Mitigation
Vendor Advisory
Hyperlink: https://github.com/jupyterhub/oauthenticator/commit/f0c7002dc36e41efae0f674033cf7888a21d96f9
Source: security-advisories@github.com
Resource:
Patch
Hyperlink: https://github.com/jupyterhub/oauthenticator/releases/tag/17.4.0
Source: security-advisories@github.com
Resource:
Product
Hyperlink: https://github.com/jupyterhub/oauthenticator/security/advisories/GHSA-rrvg-cxh4-qhrv
Source: security-advisories@github.com
Resource:
Mitigation
Vendor Advisory
Change History
0Changes found
Details not found