CVE-2026-54528

JupyterLab Git is a Git extension for JupyterLab. Prior to 0.54.0, jupyterlab-git uses fnmatch.fnmatchcase() in GitHandler.prepare() in jupyterlab_git/handlers.py to enforce excluded_paths, allowing an authenticated user on a case-insensitive filesystem to vary URL path casing and read excluded directories. This issue is fixed in version 0.54.0.

Score

CVSS 3.1 7.1 High

Status

Analyzed - security-advisories@github.com

Published

2026-07-08

Last modified

2026-10-25

Weaknesses

CWE-178

Affected products

• Jupyterlab-git (Jupyter)
• Jupyterlab-git (Jupyterlab)

References

• https://github.com/jupyterlab/jupyterlab-git/security/advisories/GHSA-436q-jwfr-rm2h
• https://github.com/jupyterlab/jupyterlab-git/commit/460035275b5963dc96e364e60ba6a73717fbd033
• https://github.com/jupyterlab/jupyterlab-git/releases/tag/v0.54.0