Vulnerability in Jupyter Jupyterlab
CVE-2025-59842
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.002 (14.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 14th percentile — 14.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Jupyter Jupyterlab
- Jupyterlab — versions < 4.4.8
Weakness classification (CWE)
References
- github.com/jupyterlab/jupyterlab/security/advisories/GHSA-vvfj-2jqx-52jm (Patch, Third Party Advisory)
- github.com/jupyterlab/jupyterlab/commit/88ef373039a8cc09f27d3814382a512d9033675c (Patch)
Frequently asked questions
- What is CVE-2025-59842?
- CVE-2025-59842 is a medium-severity vulnerability in Jupyter Jupyterlab, classified under Use of Web Link to Untrusted Target with window.opener Access. CVSS score: 4.3/10. Published 2025-09-26.
- How severe is CVE-2025-59842?
- Medium severity. CVSS v3 base score is 4.3 out of 10.