CVE-2026-73415
Published:August 12, 2026
Updated:August 31, 2026
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.
Affected Packages
jupyterlab (CONDA):
Affected version(s) >=0.0.5 <4.5.10Fix Suggestion:
Update to version 4.5.10jupyterlab (CONDA):
Affected version(s) >=4.6.0 <4.6.2Fix Suggestion:
Update to version 4.6.2jupyterlab (PYTHON):
Affected version(s) >=0.0.1 <4.5.10Fix Suggestion:
Update to version 4.5.10jupyterlab (PYTHON):
Affected version(s) >=4.6.0 <4.6.2Fix Suggestion:
Update to version 4.6.2Related Resources (15)
Do you need more information?
Contact UsCVSS v4
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
ACTIVE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
LOW
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.1
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
LOW
Weakness Type (CWE)
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
EPSS
Base Score:
0.57