Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-33175— OAuthenticator: Authentication Bypass in Auth0OAuthenticator via Unverified Email Claims

Quick assessment

Affected
jupyterhub oauthenticator
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

OAuthenticator是JupyerHub 登录处理程序的 OAuth 令牌库。 OAuthenticator 17.4.0之前版本存在安全漏洞，该漏洞源于身份验证绕过，可能导致拥有未验证电子邮件地址的攻击者登录JupyterHub。

CVSS 8.8 · High EPSS 0.64% · P49

Possible ATT&CK Techniques 1 AI

T1110.004 · Credential Stuffing
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-33175

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
OAuthenticator: Authentication Bypass in Auth0OAuthenticator via Unverified Email Claims
Source: CVE Program / CVE List V5
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
OAuthenticator 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OAuthenticator是JupyerHub 登录处理程序的 OAuth 令牌库。 OAuthenticator 17.4.0之前版本存在安全漏洞，该漏洞源于身份验证绕过，可能导致拥有未验证电子邮件地址的攻击者登录JupyterHub。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
jupyterhub oauthenticator < 17.4.0 -

II. Public POCs for CVE-2026-33175

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-33175

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-33175 (1)

Same Patch Batch · jupyterhub · 2026-04-03 · 3 CVEs total

CVE-2026-34052 5.9 MEDIUM LTI JupyterHub Authenticator: Unbounded Memory Growth via Nonce Storage (Denial of Service
CVE-2026-33709 JupyterHub has an Open Redirect Vulnerability

IV. Related Vulnerabilities

Same product: oauthenticator
Same vendor: jupyterhub
Same weakness: CWE-287

V. Comments for CVE-2026-33175

No comments yet

Leave a comment