CVE-2026-67338
5.1
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
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| jupyterlab | jupyterlab | 0 < 4.5.9 | affected |
| jupyterlab | jupyterlab | 4.5.9 | unaffected |
Weaknesses
- CWE-84: Improper Neutralization of Encoded URI Schemes in a Web Page
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
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