CVE-2026-33709 | Jupyter Notbook up to 5.4.3 Jupyterhub redirect (GHSA-3vff-hjqv-m7h8)

VDB-355274 · CVE-2026-33709 · GHSA-3VFF-HJQV-M7H8 JUPYTER NOTBOOK UP TO 5.4.3 JUPYTERHUB REDIRECT HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 4.1 $0-$5k 0.42+ Summaryinfo A vulnerability labeled as problematic has been found in Jupyter Notbook up to 5.4.3. The impacted element is an unknown function of the component Jupyterhub. Such manipulation leads to redirect. This vulnerability is traded as CVE-2026-33709. The attack may be launched remotely. There is no exploit available. The affected component should be upgraded. Detailsinfo A vulnerability was found in Jupyter Notbook up to 5.4.3. It has been rated as problematic. Affected by this issue is an unknown part of the component Jupyterhub. The manipulation with an unknown input leads to a redirect vulnerability. Using CWE to declare the problem leads to CWE-601. A web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a Redirect. This simplifies phishing attacks. Impacted is integrity. CVE summarizes: 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. The advisory is available at github.com. This vulnerability is handled as CVE-2026-33709 since 03/23/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1204.001 by the MITRE ATT&CK project. Upgrading to version 5.4.4 eliminates this vulnerability. The upgrade is hosted for download at github.com. Productinfo Vendor Jupyter Name Notbook Version 5.4.0 5.4.1 5.4.2 5.4.3 CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA CVSS-B Score: 🔒 CNA CVSS-BT Score: 🔒 CNA Vector: 🔒 CVSSv3info VulDB Meta Base Score: 4.3 VulDB Meta Temp Score: 4.1 VulDB Base Score: 4.3 VulDB Temp Score: 4.1 VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Redirect CWE: CWE-601 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: Notbook 5.4.4 Timelineinfo 03/23/2026 CVE reserved 04/04/2026 +11 days Advisory disclosed 04/04/2026 +0 days VulDB entry created 04/04/2026 +0 days VulDB entry last update Sourcesinfo Advisory: GHSA-3vff-hjqv-m7h8 Status: Confirmed CVE: CVE-2026-33709 (🔒) GCVE (CVE): GCVE-0-2026-33709 GCVE (VulDB): GCVE-100-355274 Entryinfo Created: 04/04/2026 08:09 Changes: 04/04/2026 08:09 (69) Complete: 🔍 Cache ID: 99:6B8:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸