CVE-2026-67338

mediumCVSS 6.1covered by 1 sourcefirst seen 2026-08-01

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.

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Advisory coverage (1)

mediumCVE-2026-67338: JupyterLab before 4.5.9 contains a stored cross-site scripting vulnerability in the Extension …nvd · 2026-08-01

External references

NVD record for CVE-2026-67338

CVE.org record

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