CVE-2025-59842
4.3 · MEDIUMOverview
CVE-2025-59842 is a medium-severity vulnerability affecting jupyter jupyterlab. It was published on September 26, 2025 and has a CVSS 3.1 base score of 4.3 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 4.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
jupyterlab is an extensible environment for interactive and reproducible computing, based on the Jupyter Notebook Architecture. Prior to version 4.4.8, links generated with LaTeX typesetters in Markdown files and Markdown cells in JupyterLab and Jupyter Notebook did not include the noopener attribute. This is deemed to have no impact on the default installations. Theoretically users of third-party LaTeX-rendering extensions could find themselves vulnerable to reverse tabnabbing attacks if links generated by those extensions included target=_blank (no such extensions are known at time of writing) and they were to click on a link generated in LaTeX (typically visibly different from other links). This issue has been patched in version 4.4.8.
Remediation
Check the references section for vendor advisories and patches from jupyter. Update jupyterlab to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| jupyter | jupyterlab | >= 0, < 4.4.8 | Affected |
Frequently Asked Questions
What is CVE-2025-59842?
CVE-2025-59842 is a medium-severity vulnerability affecting jupyter jupyterlab. It was published on September 26, 2025 and has a CVSS 3.1 base score of 4.3 (MEDIUM).
How severe is CVE-2025-59842?
This vulnerability has a CVSS 3.1 base score of 4.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2025-59842?
Check the references section for vendor advisories and patches from jupyter. Update jupyterlab to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2025-59842?
CyberStrike's AI-powered security agents can automatically detect CVE-2025-59842 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
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