VULNERABILITY INTELLIGENCE

CVE-2026-42266

CVSS score8.8 HIGH
EPSS probability5.65%
CISA KEVNot currently listed
Published2026-05-13
Last modified2026-08-28
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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.

Weakness classification

  • security-advisories@github.com: CWE-88
  • 0b0ca135-0b70-47e7-9f44-1890c2a1c46c: CWE-88

Primary references