High · published May 13, 2026
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.
| Product | Versions | Fixed in |
|---|---|---|
| jupyter/jupyterlab | ≥ 4.0.0, < 4.5.7 | 4.5.7 |