jupyterlab is an extensible environment for interactive and reproducible computing, based on the Jupyter Notebook Architecture

Overview

jupyterlab is an extensible environment for interactive and reproducible computing, based on the Jupyter Notebook Architecture. From 3.3.0 until 4.5.10 and 4.6.2, JupyterLab allows notebook settings to be shared and applied through an overrides.json file using the Import button in the Settings Editor. In packages/notebook-extension/schema/tracker.json and packages/notebook-extension/src/index.ts, the sideBySideLeftMarginOverride and sideBySideRightMarginOverride settings are not properly validated before being inserted into style content, allowing a crafted settings file to contain instructions that execute as code instead of only changing display preferences. A user can import the malicious file, or an attacker with access to a shared settings location can plant an overrides.json that is applied automatically. The embedded code runs with the affected user's access and can read or modify notebooks and files and run code through the notebook server, including on a connected kernel. This issue is fixed in versions 4.5.10 and 4.6.2.

Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

Package advisory (CVE-2026-73417)

Affected packages:

• jupyterlab >= 4.6.0, < 4.6.2
• jupyterlab >= 3.3.0, < 4.5.10

Patched in:

• jupyterlab 4.6.2
• jupyterlab 4.5.10

Source: https://osv.dev/vulnerability/GHSA-pppj-hq3g-57pj

Vendor advisories

• RHSA-2026:65126 · Red Hat · fixed in: Red Hat OpenShift AI 2.25 · released 2026-09-08 · advisory
• Red Hat VEX · Important · affected: Migration Toolkit for Applications 8, Red Hat OpenShift AI (RHOAI) · no fix planned: Migration Toolkit for Applications 8, Red Hat OpenShift AI (RHOAI) · updated 2026-09-08 · vex