CVE-2026-73415

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.

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Publisher and database URLs for this record (shown for attribution; reading stays in Bugflare).

• https://github.com/jupyterlab/jupyterlab/commit/9365f020baec5221deaf11535ed554c06637c999
• https://github.com/jupyterlab/jupyterlab/commit/be9303f5bcd5308eaeae953c5a3c903046682c2c
• https://github.com/jupyterlab/jupyterlab/commit/f1beab4a2027af4719d6edc07d52d6cf5a39a432
• https://github.com/jupyterlab/jupyterlab/pull/19184
• https://github.com/jupyterlab/jupyterlab/pull/19185
• https://github.com/jupyterlab/jupyterlab/pull/19186
• https://github.com/jupyterlab/jupyterlab/releases/tag/v4.5.10
• https://github.com/jupyterlab/jupyterlab/releases/tag/v4.6.2
• https://github.com/jupyterlab/jupyterlab/releases/tag/v4.7.0a1
• https://github.com/jupyterlab/jupyterlab/security/advisories/GHSA-gx64-gj6p-pc4c