Cross-site Scripting (XSS) Affecting jupyterlab package, versions *


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.18% (8th percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-JUPYTERLAB-18505645
  • published2 Aug 2026
  • disclosed1 Aug 2026

Introduced: 1 Aug 2026

NewCVE-2026-67338  (opens in a new tab)
CWE-84  (opens in a new tab)

How to fix?

There is no fixed version for Debian:unstable jupyterlab.

NVD Description

Note: Versions mentioned in the description apply only to the upstream jupyterlab package and not the jupyterlab package as distributed by Debian. See How to fix? for Debian:unstable relevant fixed versions and status.

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 Base Scores

version 3.1