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.
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describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-42266US | — | — | ||
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 th… | ||||
02
references
External citations — patches, advisories, analysis.
- https://github.com/jupyterlab/jupyterlab/releases/tag/v4.5.7FIX
- https://github.com/jupyterlab/jupyterlab/security/advisories/GHSA-37w4-hwhx-4rc4ADVISORY
- https://jupyterhub.readthedocs.io/en/5.2.1/explanation/websecurity.htmlWEB
- https://jupyterlab.readthedocs.io/en/latest/user/extensions.html#extension-manager-implementationsWEB
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