UBUNTU-CVE-2026-42266

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Source

https://ubuntu.com/security/CVE-2026-42266

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42266.json

JSON Data

https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-42266

Upstream

CVE-2026-42266

Published

2026-05-13T16:16:00Z

Modified

2026-06-30T18:18:06Z

Severity

8.8 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
8.8 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Ubuntu - medium

Summary

[none]

Details

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.

References

Affected packages

Ubuntu:25.10 / jupyterlab

Package

Name: jupyterlab
Purl: pkg:deb/ubuntu/jupyterlab?arch=source&distro=questing

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

4.*

4.0.11+ds1+~cs11.25.27-5

4.0.11+ds1+~cs11.25.27-6

4.0.11+ds1+~cs11.25.27-7

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "jupyterlab",
            "binary_version": "4.0.11+ds1+~cs11.25.27-7"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42266.json"

Ubuntu:26.04:LTS / jupyterlab