CVE-2026-33175— OAuthenticator: Authentication Bypass in Auth0OAuthenticator via Unverified Email Claims
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I. Basic Information for CVE-2026-33175
Vulnerability Information
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Vulnerability Title
OAuthenticator: Authentication Bypass in Auth0OAuthenticator via Unverified Email Claims
Source: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
认证机制不恰当
Source: NVD (National Vulnerability Database)
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 |
|---|
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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
- CVE-2026-34052
LTI JupyterHub Authenticator: Unbounded Memory Growth via No - CVE-2026-33709
JupyterHub has an Open Redirect Vulnerability - CVE-2025-32428
Jupyter Remote Desktop Proxy makes TigerVNC accessible via t - CVE-2023-25574
JupyterHub's LTI13Authenticator: JWT signature not validated - CVE-2024-41942
JupyterHub has a privilege escalation vulnerability with the
Same weakness: CWE-287
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Industrial Application Software IAS Canias ERP Login RMI imp - CVE-2026-8216
Industrial Application Software IAS Canias ERP Java RMI Sess - CVE-2026-8214
Industrial Application Software IAS Canias ERP RMI doAction - CVE-2026-42560
auth: Patreon provider assigns the same local user ID to eve - CVE-2026-41070
openvpn-auth-oauth2 returns FUNC_SUCCESS on client-deny, all
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