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Vulnerability details

CVE-2026-102530

jupyterlab jupyterlab-desktop

JupyterLab Desktop: Cross-Site Scripting (XSS) leading to Remote Code Execution on Connect URL

CVSS 4.0
9.4Critical

Official description

JupyterLab Desktop is the cross-platform desktop application for JupyterLab. Prior to 4.6.2-1, remote-server URLs were inserted into the server-selection dialog and Welcome view without safe encoding. An attacker who convinces a user to submit a crafted URL can execute JavaScript in the Welcome renderer and abuse its privileged IPC bridge to execute arbitrary code with the user’s privileges. The Welcome view also unsafely renders RSS news-feed titles; exploitation through this separate input path requires control over content delivered through the application’s Jupyter Blog feed or its cached feed data, rather than submission of a remote-server URL. This issue affects all supported platforms and is fixed in version 4.6.2-1.

CVSS scores

ScoreVersionSourceVector
9.4Critical 4.0 CVEProject cvelistV5 (CNA) (GitHub_M) CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Affected products

VendorProductVersionsSource
jupyterlab jupyterlab-desktop < 4.6.2-1 CVEProject cvelistV5 (CNA)

References and advisories

3
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Details

Published
2026-11-07
Last updated
2026-11-10
State
Published
Assigner (CNA)
GitHub_M
Kolun priority
23 · Low

Exploit prediction (EPSS)

0.41%
Probability of exploitation in 30 days
36.2%
Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable
No
Exploitation
None
Technical impact
Total

Weaknesses (CWE)

  • CWE-79
    Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
  • CWE-94
    Improper Control of Generation of Code ('Code Injection')
  • CWE-116
    Improper Encoding or Escaping of Output