CVE-2026-67338Medium· 6.1▾ SunlitJupyterLab 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 p…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 33.6 · likelihood 0.1 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Aug 2.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.2%
0.2% → 0.3%
Last analysed / modified upstream
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.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Affected packages:
jupyterlab < 4.5.9Patched in:
jupyterlab 4.5.9Connected by shared product, vendor, weakness, or advisory.
GHSA-vmhf-c436-hxj4MediumJupyterLab: Stored XSS in extension manager through package metadata unsanitized URI protocol
CVE-2026-102832Medium· 4.2JupyterLab is an extensible environment for interactive and reproducible computing, based on the Jupyter Notebook Architecture
CVE-2026-102904Medium· 5.4JupyterLab is an extensible environment for interactive and reproducible computing, based on the Jupyter Notebook Architecture
CVE-2026-102830Medium· 6.8JupyterLab is an extensible environment for interactive and reproducible computing, based on the Jupyter Notebook Architecture
CVE-2026-102831High· 8.1JupyterLab is an extensible environment for interactive and reproducible computing, based on the Jupyter Notebook Architecture
CVE-2026-73626High· 7.5JupyterLab versions >=4.6.0,<=4.6.1 and <=4.5.9 contain an allowlist/blocklist enforcement gap in PyPIExtensionManager.install()