{"id":"UBUNTU-CVE-2026-67338","details":"JupyterLab before 4.5.9 contains a stored cross-site scripting vulnerability in the Extension Manager that fails to validate URI protocols in package metadata URLs. Attackers can publish malicious PyPI packages with javascript: URLs in project metadata that execute arbitrary JavaScript in the JupyterLab origin when users click the extension name.","modified":"2026-08-06T00:23:23Z","published":"2026-08-01T13:17:00Z","upstream":["CVE-2026-67338"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-67338"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-67338"},{"type":"REPORT","url":"https://github.com/jupyterlab/jupyterlab/security/advisories/GHSA-vmhf-c436-hxj4"},{"type":"REPORT","url":"https://github.com/jupyterlab/jupyterlab/commit/4e61e07d0a91145b53fbf96ac74b0387f6bc51f6"},{"type":"REPORT","url":"https://github.com/jupyterlab/jupyterlab/commit/d5d961f6e10a6442dddbf94d9a976b3897055a12"},{"type":"REPORT","url":"https://github.com/jupyterlab/jupyterlab/commit/4e61e07d0a91145b53fbf96ac74b0387f6bc51f6"},{"type":"REPORT","url":"https://github.com/jupyterlab/jupyterlab/commit/d5d961f6e10a6442dddbf94d9a976b3897055a12"},{"type":"REPORT","url":"https://www.vulncheck.com/advisories/jupyterlab-before-stored-xss-via-extension-manager"}],"affected":[{"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-2026-67338.json"}}],"schema_version":"1.8.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N"},{"type":"Ubuntu","score":"medium"}]}