CVE-2026-42266

HighCVSS 8.8/10Last modified Nov 11, 2026

Description

JupyterLab is an extensible environment for interactive and reproducible computing, based on the Jupyter Notebook Architecture. From 4.0.0 to 4.5.6, the allow-list of extensions that can be installed from PyPI Extension Manager (allowed_extensions_uris) is not correctly enforced by JupyterLab. The PyPI Extension Manager was not contained to packages listed on the default PyPI index. This vulnerability is fixed in 4.5.7.

Metrics

CVSS 3.1 8.8/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-88 CWE-602

Affected software

Vendor	Product	Versions
jupyterlab	jupyterlab	>= 4.0.0, < 4.5.7
Red Hat	Red Hat Migration Toolkit for Applications 8.2	—
Red Hat	Red Hat OpenShift AI 3.4	—
Red Hat	Red Hat OpenShift AI 3.4	—
Red Hat	Red Hat OpenShift AI 3.4	—
Red Hat	Red Hat OpenShift AI 3.4	—
Red Hat	Red Hat OpenShift AI 3.4	—
Red Hat	Red Hat OpenShift AI 3.4	—
Red Hat	Red Hat OpenShift AI 3.4	—
Red Hat	Red Hat OpenShift AI 3.4	—
Red Hat	Red Hat OpenShift AI 3.4	—
Red Hat	Red Hat OpenShift AI 3.4	—
Red Hat	Red Hat OpenShift AI 3.4	—
Red Hat	Red Hat OpenShift AI 3.4	—
Red Hat	Red Hat OpenShift AI (RHOAI)	—
Red Hat	Red Hat OpenShift AI (RHOAI)	—
Red Hat	Red Hat OpenShift AI (RHOAI)	—

References

Timeline

Published: May 13, 2026
Last modified: Nov 11, 2026
NVD status: Modified

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