PT-2026-59197

Summary jupyterlab-git 0.53.0 latest, 2026-04-30 uses fnmatch.fnmatchcase in GitHandler.prepare jupyterlab git/handlers.py:91 to enforce the admin-configured excluded paths security control. Because fnmatchcase is unconditionally case-sensitive, an authenticated user on a case-insensitive...

CVE-2026-54528

A flaw was found in JupyterLab Git, a Git extension for JupyterLab. This vulnerability allows an authenticated user on a case-insensitive filesystem to bypass administrator-configured excluded paths by varying the case of the URL path segment. This bypass enables the user to read file content, vi...

CVE-2026-54528

Summary of vulnerability (CVE-2026-54528): The jupyterlab-git extension for JupyterLab is affected prior to version 0.54.0. On case-insensitive filesystems (e.g., macOS APFS, Windows NTFS), the code path that enforces excluded_paths uses fnmatch.fnmatchcase(), which is case-sensitive and can be b...