CVE-2026-102830

JupyterLab is an extensible environment for interactive and reproducible computing, based on the Jupyter Notebook Architecture. From JupyterLab 3.0.0 until 4.5.11 and 4.6.4, and in JupyterLite Core 0.8.3 and earlier, the Plural-Forms header in a selected third-party language pack can append...

CVE-2026-102830

A vulnerability in JupyterLab (versions 3.0.0 through 4.5.11 and 4.6.4) and JupyterLite Core (0.8.3 and earlier) allows for the execution of arbitrary JavaScript. The root cause is a prefix-only regular-expression validation in the Plural-Forms header of certain third-party language packs, which ...

EUVD-2026-89337

JupyterLab is an extensible environment for interactive and reproducible computing, based on the Jupyter Notebook Architecture. From JupyterLab 3.0.0 until 4.5.11 and 4.6.4, and in JupyterLite Core 0.8.3 and earlier, the Plural-Forms header in a selected third-party language pack can append...

CVE-2026-102830 JupyterLab: Cross-site scripting (XSS) in JupyterLab via crafted language package (jupyterlab.json)

JupyterLab is an extensible environment for interactive and reproducible computing, based on the Jupyter Notebook Architecture. From JupyterLab 3.0.0 until 4.5.11 and 4.6.4, and in JupyterLite Core 0.8.3 and earlier, the Plural-Forms header in a selected third-party language pack can append...

CVE-2026-102830 JupyterLab: Cross-site scripting (XSS) in JupyterLab via crafted language package (jupyterlab.json)

JupyterLab is an extensible environment for interactive and reproducible computing, based on the Jupyter Notebook Architecture. From JupyterLab 3.0.0 until 4.5.11 and 4.6.4, and in JupyterLite Core 0.8.3 and earlier, the Plural-Forms header in a selected third-party language pack can append...

@datalayer/jupyter-react (>=0.0.6, <=0.9.5), @fails-components/jupyter-applet-view (>=0.0.1-alpha.3, <=0.0.4) +21 more potentially affected by CVE-2026-42557 via @jupyterlab/apputils (>=4.0.0, <=4.5.10)

@jupyterlab/apputils NPM version =4.0.0, =0.0.6, =0.0.1-alpha.3, =0.0.1-alpha.3, =0.0.1-alpha.3, =0.0.1-alpha.3, =7.1.0-rc.1, =7.1.0-rc.1, =7.1.0-rc.1, =7.1.0-rc.1, =7.1.0-rc.1, =7.1.0-rc.1, =0.2.0-alpha.0, =0.6.0-alpha.10, =0.6.0-alpha.10, =0.6.0-alpha.3, =0.6.0-alpha.9 and more Source cves:...

@fails-components/jupyter-applet-view (>=0.0.1-alpha.3, <=0.0.1-alpha.18), @fails-components/jupyter-filesystem-extension (>=0.0.1-alpha.3, <=0.0.1-alpha.18) +3 more potentially affected by CVE-2026-42557 via @jupyterlab/help-extension (>=4.0.13, <=4.4.10)

@jupyterlab/help-extension NPM version =4.0.13, =0.0.1-alpha.3, =0.0.1-alpha.3, =0.0.1-alpha.3, =0.0.1-alpha.3, =0.2.0-alpha.0, =0.6.0-alpha.9 Source cves: CVE-2026-42557 Source advisory: SNYK:JS-JUPYTERLABHELPEXTENSION-16438961...

HTML Injection

JupyterLite-core is vulnerable to HTML Injection. The vulnerability is due to insufficient validation of Markdown content, allowing a malicious notebook or file to access data and perform actions in the JupyterLite environment...

GHSA-GJ55-2XF9-67RQ HTML injection in JupyterLite leading to DOM Clobbering

Impact The vulnerability depends on user interaction by opening a malicious notebook with Markdown cells, or Markdown file using JupyterLab preview feature. A malicious user can access any data accessible from JupyterLite and perform arbitrary actions in JupyterLite environment. Patches JupyterLi...

PT-2024-40302 · Jupyterlab +1 · @Jupyterlab/Mathjax-Extension +3

Name of the Vulnerable Software and Affected Versions: JupyterLite versions prior to 0.4.1 Description: The issue depends on user interaction by opening a malicious notebook with Markdown cells or a Markdown file using the JupyterLab preview feature. A malicious user can access any data accessibl...