{"id":"UBUNTU-CVE-2026-42266","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.","modified":"2026-06-30T18:18:06.326602546Z","published":"2026-05-13T16:16:00Z","upstream":["CVE-2026-42266"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-42266"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-42266"},{"type":"REPORT","url":"https://github.com/jupyterlab/jupyterlab/security/advisories/GHSA-37w4-hwhx-4rc4"}],"affected":[{"package":{"name":"jupyterlab","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/jupyterlab?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["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_version":"4.0.11+ds1+~cs11.25.27-7","binary_name":"jupyterlab"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42266.json"}},{"package":{"name":"jupyterlab","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/jupyterlab?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.0.11+ds1+~cs11.25.27-7","4.0.11+ds1+~cs11.25.27-8","4.0.11+ds1+~cs11.25.27-9"],"ecosystem_specific":{"binaries":[{"binary_version":"4.0.11+ds1+~cs11.25.27-9","binary_name":"jupyterlab"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42266.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}