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Fencer Vulns
medium 4.3

CVE-2025-59842 json

JupyterLab LaTeX typesetter links did not enforce `noopener` attribute

published 2025-09-26 13 mo ago modified 2026-10-19 20 d ago also BIT-jupyterlab-2025-59842 , EUVD-2025-31350 , GHSA-vvfj-2jqx-52jm , PYSEC-2026-1482

cvss
4.3
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 16%
public exploits
0
none known

Summary

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.

Patch / fix

  • pypi jupyterlab 4.4.8
  • bitnami jupyterlab 4.4.8
  • jupyter jupyterlab 4.4.8
  • jupyterlab Debian 14 4.4.10+ds1+~3.1.0+~0.16.6+~cs1.4.4-3

debian advisories DEBIAN-CVE-2025-59842

  • python-jupyterlab openSUSE Tumbleweed 4.4.9-1.1

opensuse advisories openSUSE-SU-2025:15591-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-59842 updated cvss 3.1

jupyterlab: JupyterLab LaTeX typesetter links did not enforce `noopener` attribute

  • Red Hat OpenShift AI (RHOAI) rhoai/odh-notebook-controller-rhel8, rhoai/odh-kf-notebook-controller-rhel8
    affected: workaround, no fix available “Fix deferred”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
13 mo ago

Exploit prediction

0.25% chance of exploitation in the next 30 days, higher than 16% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 2.1 CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
CNA 4.0 2.1 CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
NVD 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
OSV 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

Affected packages

ecosystem package affected fixed in
pypi jupyterlab
<4.4.8
4.4.8
bitnami jupyterlab
<4.4.8
4.4.8

Affected products

  • jupyterlab jupyterlab

Classification

Weakness
  • CWE-1022 Use of Web Link to Untrusted Target with window.opener Access

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.