VULNERABILITY INTELLIGENCE
CVE-2026-67338
CVSS score6.1 MEDIUM
EPSS probability0.30%
CISA KEVNot currently listed
Published2026-08-01
Last modified2026-10-08
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
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.
Weakness classification
- disclosure@vulncheck.com: CWE-84