Jupyter Notbook up to 5.4.3 Jupyterhub redirect

CVSS Meta Temp Score
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CTI Interest Score
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4.1$0-$5k0.55

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.

The vulnerability scanner Nessus provides a plugin with the ID 305006 (Linux Distros Unpatched Vulnerability : CVE-2026-33709), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.4.4 eliminates this vulnerability. The upgrade is hosted for download at github.com.

The vulnerability is also documented in the vulnerability database at Tenable (305006). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

Name

Version

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

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 305006
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-33709

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
04/06/2026 +2 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
Updated: 04/06/2026 23:18
Changes: 04/04/2026 08:09 (69), 04/06/2026 23:18 (2)
Complete: 🔍
Cache ID: 216:6E3:103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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