CVE-2026-102530 JupyterLab Desktop: Cross-Site Scripting (XSS) leading to Remote Code Execution on Connect URL
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 4.0 detail
Vector CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:HExploitable remotely over the network, without an account and if a user takes an action; an attacker can seriously compromise confidentiality, integrity or availability.
- Attack vector
- Network
- Attack complexity
- Low
- Attack requirements
- None
- Privileges required
- None
- Interaction
- Active
- Confidentiality
- High
- Integrity
- High
- Availability
- High
- Confidentiality of other systems
- High
- Integrity of other systems
- High
- Availability of other systems
- High
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| jupyterlab-desktop 4.6 | earliest → < 4.6.2-1 | 4.6.2-1 |