CVE WatchAug 1, 2026

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 i

CVSS

6.1

Medium

EPSS

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KEV

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Exploit Today

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0-100

Published: Aug 1, 2026 · Last modified: Aug 1, 2026 · CWE-84

EPSS · 30d

Not enough EPSS history yet.

Technical 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.

Official references

Related CVEs

CVECVSSEPSSKEVRExploitTitleMod.

CVE-2026-54443—

13.8%

——4Dashy is a self-hostable personal dashboard. From 1.9.4 until 3.2.0, the Dashy RSS Widget in src/components/Widgets/RssFeed.vue does not sanitize RSS item link values before rendering feed item titles and Read More links as anchor href attributes, allowing an attacker-controlled feed to provide a javascript: URI that executes when clicked in the Dashy origin. This issue is fixed in version 3.2.0.17d