{"id":"CVE-2026-67338","revision":"e8e165fa82e3460f936613342590811f","records":[{"revision":"e8e165fa82e3460f936613342590811f","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-67338","aliases":[],"title":"JupyterLab before 4.5.9 Stored XSS via Extension Manager","description":"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.","state":0,"publishedAt":"2026-08-01T12:22:17.437+00:00","modifiedAt":"2026-10-08T15:24:13.033+00:00","affected":[{"ecosystem":"Vendor product","name":"jupyterlab","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"jupyterlab\",\n                    \"product\": \"jupyterlab\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThan\": \"4.5.9\"\n                        },\n                        {\n                            \"version\": \"4.5.9\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ],\n                    \"packageURL\": \"pkg:pypi/jupyterlab\"\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"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","score":5.1,"severity":"MEDIUM"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","score":6.1,"severity":"MEDIUM"}],"references":["https://github.com/jupyterlab/jupyterlab/security/advisories/GHSA-vmhf-c436-hxj4","https://github.com/jupyterlab/jupyterlab/commit/4e61e07d0a91145b53fbf96ac74b0387f6bc51f6","https://github.com/jupyterlab/jupyterlab/commit/d5d961f6e10a6442dddbf94d9a976b3897055a12","https://www.vulncheck.com/advisories/jupyterlab-before-stored-xss-via-extension-manager"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-67338","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-67338","identifiers":["CVE-2026-67338"]},"retained":false,"historicalAffected":[]}],"coverage":[]}