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.
CVSS 6.1EPSS 0.17500000000000002%Risk 0.62
View source- Published
- 2026-08-01 13:17:04
- Affected versions
- <4.5.9
- Type
- Web application
- Last modified
- 2026-08-03 20:17:27
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N