CVE-2026-54527
Published:July 08, 2026
Updated:July 21, 2026
JupyterLab Git is a Git extension for JupyterLab. From 0.30.0b3 before 0.54.0, the PlainTextDiff.ts createHeader() method passes Git filenames directly to innerHTML when rendering renamed files in commit history, allowing a crafted filename to execute JavaScript when a victim views the rename diff in the Git History tab. This issue is fixed in version 0.54.0.
Affected Packages
jupyterlab-git-core (CONDA):
Affected version(s) =0.53.0 <0.54.0Fix Suggestion:
Update to version 0.54.0jupyterlab-git (CONDA):
Affected version(s) >=0.30.0 <0.54.0Fix Suggestion:
Update to version 0.54.0https://github.com/jupyterlab/jupyterlab-git.git (GITHUB):
Affected version(s) >=v0.3.0 <v0.54.0Fix Suggestion:
Update to version v0.54.0@jupyterlab/git (NPM):
Affected version(s) >=0.30.0-beta.1 <0.54.0Fix Suggestion:
Update to version 0.54.0jupyterlab-git-core (PYTHON):
Affected version(s) >=0.53.0a1 <0.54.0Fix Suggestion:
Update to version 0.54.0jupyterlab-git (PYTHON):
Affected version(s) >=0.30.0b3 <0.54.0Fix Suggestion:
Update to version 0.54.0Related Resources (8)
Do you need more information?
Contact UsCVSS v4
Base Score:
9.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
ACTIVE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
HIGH
Subsequent System Integrity
HIGH
Subsequent System Availability
HIGH
CVSS v3
Base Score:
9
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
EPSS
Base Score:
0.30