MEDIUMVulnerability
CVE-2026-67338
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.
Properties
- severity
- MEDIUM
- score
- 6.1
- epss_score
- 0.00172
- cve_id
- CVE-2026-67338
- vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- published_at
- 2026-08-01T13:17:04.843
- last_modified
- 2026-09-09T20:36:38.867
- epss_percentile
- 0.06792
Related Entities (3)
ENRICHED_BY (1)
→[Source]FIRST EPSS
DESCRIBED_BY (1)
→[Source]NVD
HAS_WEAKNESS (1)
→[Weakness]Improper Neutralization of Encoded URI Schemes in a Web Page
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