CVE-2026-33709— JupyterHub has an Open Redirect Vulnerability
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I. Basic Information for CVE-2026-33709
Vulnerability Information
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Vulnerability Title
JupyterHub has an Open Redirect Vulnerability
Source: NVD (National Vulnerability Database)
Vulnerability Description
JupyterHub is software that allows one to create a multi-user server for Jupyter notebooks. Prior to version 5.4.4, an open redirect vulnerability in JupyterHub allows attackers to construct links which, when clicked, take users to the JupyterHub login page, after which they are sent to an arbitrary attacker-controlled site outside JupyterHub instead of a JupyterHub page, bypassing JupyterHub's check to prevent this. This issue has been patched in version 5.4.4.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
指向未可信站点的URL重定向(开放重定向)
Source: NVD (National Vulnerability Database)
Vulnerability Title
JupyterHub 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
JupyterHub是JupyterHub开源的一款用于Jupyter的多用户服务器。 JupyterHub 5.4.4之前版本存在输入验证错误漏洞，该漏洞源于开放重定向，可能导致用户被重定向至攻击者控制的站点。
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 | jupyterhub | < 5.4.4 | - |
II. Public POCs for CVE-2026-33709
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · jupyterhub · 2026-04-03 · 3 CVEs total
| CVE-2026-33175 | 8.8 HIGH | OAuthenticator: Authentication Bypass in Auth0OAuthenticator via Unverified Email Claims |
| CVE-2026-34052 | 5.9 MEDIUM | LTI JupyterHub Authenticator: Unbounded Memory Growth via Nonce Storage (Denial of Service |
IV. Related Vulnerabilities
Same vendor: jupyterhub
- CVE-2026-34052
LTI JupyterHub Authenticator: Unbounded Memory Growth via No - CVE-2026-33175
OAuthenticator: Authentication Bypass in Auth0OAuthenticator - 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-601
- CVE-2026-42350
Kargo: Open Redirect in UI OIDC Login Flow via redirectTo Qu - CVE-2026-42195
Unvalidated gitlab URL parameter redirects OAuth authorize s - CVE-2026-3318
Multiple vulnerabilities in Cradle e-commerce - CVE-2026-42259
Saltcorn: Open Redirect in `POST /auth/login` due to incompl - CVE-2026-6795
Open Redirect in DivvyDrive Information Technologies' DivvyD
V. Comments for CVE-2026-33709
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