PT-2026-51066 · Pypi · Jupyterlab-Git
CVE-2026-54528
·
Published
2026-06-19
·
Updated
2026-07-13
CVSS v3.1
7.1
High
| Vector | AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N |
Name of the Vulnerable Software and Affected Versions
jupyterlab-git versions prior to 0.54.0
Description
An authenticated user on a case-insensitive filesystem (such as macOS APFS or Windows NTFS) can bypass the
excluded paths security control. The issue occurs because the GitHandler.prepare() function in jupyterlab git/handlers.py uses fnmatch.fnmatchcase(), which is unconditionally case-sensitive. By varying the casing of the URL path segment, an attacker can access directories that the administrator explicitly excluded.This bypass allows the user to:
- Read file content via the
/contentendpoint. - Read working tree files in excluded directories.
- View git status, logs, and diffs on the excluded path.
- Enumerate commits affecting excluded files.
Recommendations
Update jupyterlab-git to version 0.54.0 or later.
Exploit
Fix
Found an issue in the description? Have something to add? Feel free to write us 👾
Weakness Enumeration
Related Identifiers
Affected Products
Jupyterlab-Git