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Vulnerability record · CVE-2026-73415 · published 12 August 2026

CVE-2026-73415: Cross-site scripting vulnerability

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.

7.5 CVSS 4.0 High EPSS 0.74% · top 47.4% CWE-79 · Cross-site scripting Awaiting Analysis
7.5CVSS 4.0 base score
0.74%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
10References
9 Sep 2026Last modified by NVD

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.

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
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

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Source: NIST National Vulnerability Database (record CVE-2026-73415), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.