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…
High CVSS 8.8
Summary
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.
In-depth triage · Auto channel
No in-depth report has been generated yet (DR-003 v2 AI pipeline is under construction).
Affected products
- :
Lint boundary warnings (2)
The following non-blocking warnings were raised during the lint phase of this triage (e.g. reference URLs not yet on the allowlist). They do not affect entry usability and are disclosed for transparency (see DR-002).
-
REF_URL_NOT_ALLOWLISTEDurl not in allowlist: https://jupyterhub.readthedocs.io/en/5.2.1/explanation/websecurity.html -
REF_URL_NOT_ALLOWLISTEDurl not in allowlist: https://jupyterlab.readthedocs.io/en/latest/user/extensions.html#extension-manager-implementations
Sources
- NVD DATABASE
Original Links
- https://github.com/jupyterlab/jupyterlab/releases/tag/v4.5.7 Patch
- https://github.com/jupyterlab/jupyterlab/security/advisories/GHSA-37w4-hwhx-4rc4 Mitigation
- https://jupyterhub.readthedocs.io/en/5.2.1/explanation/websecurity.html Product
- https://jupyterlab.readthedocs.io/en/latest/user/extensions.html#extension-manager-implementations Product
- https://access.redhat.com/errata/RHSA-2026:43038
- https://access.redhat.com/security/cve/CVE-2026-42266
- https://bugzilla.redhat.com/show_bug.cgi?id=2477072
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42266.json
Timeline
- nvd_ingest NVD