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OpenAdvisories
High · 7.1 CVE-2026-54528 EUVD-2026-42429GHSA-436q-jwfr-rm2hPYSEC-2026-2539

jupyterlab-git excluded_paths Case-Sensitivity Bypass Allows Reading Excluded Directories

Published Jul 8, 2026 · Updated Jul 9, 2026 · Assigned by GitHub_M

Description

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.

Affected products

VendorProductAffectedFixed
jupyterlab jupyterlab-git < 0.54.0 —

Affected packages

EcosystemPackageAffectedFixedRecord
PyPI jupyterlab-git < 0.54.0 0.54.0 GHSA-436q-jwfr-rm2h

References