{"id":"BIT-jupyterlab-2026-67338","summary":"JupyterLab before 4.5.9 Stored XSS via Extension Manager","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.","aliases":["CVE-2026-67338","GHSA-vmhf-c436-hxj4"],"modified":"2026-10-14T11:11:02.670615521Z","published":"2026-10-14T08:45:27.772Z","database_specific":{"severity":"Medium","cpes":["cpe:2.3:a:jupyter:jupyterlab:*:*:*:*:*:python:*:*"]},"references":[{"type":"WEB","url":"https://github.com/jupyterlab/jupyterlab/commit/4e61e07d0a91145b53fbf96ac74b0387f6bc51f6"},{"type":"WEB","url":"https://github.com/jupyterlab/jupyterlab/commit/d5d961f6e10a6442dddbf94d9a976b3897055a12"},{"type":"WEB","url":"https://github.com/jupyterlab/jupyterlab/security/advisories/GHSA-vmhf-c436-hxj4"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-67338"},{"type":"WEB","url":"https://www.vulncheck.com/advisories/jupyterlab-before-stored-xss-via-extension-manager"}],"affected":[{"package":{"name":"jupyterlab","ecosystem":"Bitnami","purl":"pkg:bitnami/jupyterlab"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"4.5.9"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/jupyterlab/BIT-jupyterlab-2026-67338.json"},"severity":[{"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"}]}],"schema_version":"1.9.0"}