CVE-2026-73415: PYSEC-2026-3671 - JupyterLab: Image viewer allows XSS when opening malicious image in new browser tab

CVE-2026-73415 · Severity: medium · CVSS 4 · Published 2026-08-19

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

Technologies: jupyterlab (PyPI). Vendors: PyPI.

Quick answers

Is CVE-2026-73415 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-73415 being exploited in the wild.
How severe is CVE-2026-73415?
Medium severity, with a CVSS score of 4, published 19 August 2026.
Which products and versions are affected?
jupyterlab (PyPI) ECOSYSTEM:introduced=0,fixed=4.5.10,introduced=4.6.0,fixed=4.6.2, ECOSYSTEM:introduced=4.6.0,fixed=4.6.2.
Is there a fix for CVE-2026-73415?
Yes. jupyterlab (PyPI): upgrade to 4.6.2 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2026-73415?
Check whether you run jupyterlab (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • jupyterlab (PyPI): upgrade to 4.6.2 or later
    pip install "jupyterlab>=4.6.2"

Affected products

  • jupyterlab (PyPI) ECOSYSTEM:introduced=0,fixed=4.5.10,introduced=4.6.0,fixed=4.6.2, ECOSYSTEM:introduced=4.6.0,fixed=4.6.2

Identifiers

  • CVE-2026-73415
  • GHSA-gx64-gj6p-pc4c
  • PYSEC-2026-3671

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