CVEvulnerability
CVE-2026-42266
8.8 HIGH
Official page ↗
- Status
- Modified
- Published
- 2026-05-13
- Last modified
- 2026-08-28
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 8.8 HIGH — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CVSS 3.1 (0b0ca135-0b70-47e7-9f44-1890c2a1c46c)
- 8.8 HIGH — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weaknesses
- CWE-602, CWE-88
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.
Affected configurations
• jupyter jupyterlab (>= 4.0.0 < 4.5.7)
Related
References
- https://github.com/jupyterlab/jupyterlab/releases/tag/v4.5.7 Patch, Release Notes
- https://github.com/jupyterlab/jupyterlab/security/advisories/GHSA-37w4-hwhx-4rc4 Mitigation, Vendor Advisory
- 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 access.redhat.com
- https://access.redhat.com/errata/RHSA-2026:60520 access.redhat.com
- https://access.redhat.com/security/cve/CVE-2026-42266 access.redhat.com
- https://bugzilla.redhat.com/show_bug.cgi?id=2477072 bugzilla.redhat.com
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42266.json security.access.redhat.com