CVE-2026-42266
8.8 HIGHJupyterLab is an extensible environment for interactive and reproducible computing, based on the Jupyter Notebook Architecture
Published: 2026-05-13 · Last updated: 2026-05-26
Severity and scoring
- CVSS
- 8.8 HIGH
- Vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CWE
- CWE-602, CWE-88
Affected products
| Vendor | Product |
|---|---|
| jupyter | jupyterlab |
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.
Source: NVD
References
- [NVD]https://nvd.nist.gov/vuln/detail/CVE-2026-42266
- [Patch]https://github.com/jupyterlab/jupyterlab/releases/tag/v4.5.7
- [Vendor advisory]https://github.com/jupyterlab/jupyterlab/security/advisories/GHSA-37w4-hwhx-4rc4
- [Other]https://jupyterhub.readthedocs.io/en/5.2.1/explanation/websecurity.html
- [Other]https://jupyterlab.readthedocs.io/en/latest/user/extensions.html#extension-manager-implementations
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