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Vulnerabilities CVE-2026-73415

CVE-2026-73415

High
Open
TLP:CLEAR

jupyterlab: Image viewer in JupyterLab allows XSS when opening malicious image in new browser tab

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Description

jupyterlab is an extensible environment for interactive and reproducible computing, based on the Jupyter Notebook Architecture. Prior to 4.5.10 and 4.6.2, in packages/imageviewer/src/widget.ts, JupyterLab's ImageViewer uses URL.createObjectURL for a specially crafted SVG image and revokes the blob URL too early, allowing the image to retain an executable same-origin context when it is opened through the image viewer and then opened in a new browser tab. The resulting cross-site scripting can be used to execute arbitrary code on the JupyterLab server. This issue is fixed in versions 4.5.10 and 4.6.2.

Details

CVSS Score
7.5
CVSS Vector
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N
Confidence
90%
Published
Aug 12, 2026
Last Modified
Aug 12, 2026
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