CVE-2026-54528
HIGHjupyterlab-git excluded_paths Case-Sensitivity Bypass Allows Reading Excluded Directories
Title source: cnaDescription
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.
References (3)
Core 3
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/jupyterlab/jupyterlab-git/security/advisories/GHSA-436q-jwfr-rm2h
X_Refsource_Misc x_refsource_misc
https://github.com/jupyterlab/jupyterlab-git/commit/460035275b5963dc96e364e60ba6a73717fbd033
X_Refsource_Misc x_refsource_misc
https://github.com/jupyterlab/jupyterlab-git/releases/tag/v0.54.0
Scores
CVSS v3
7.1
EPSS
0.0035
EPSS Percentile
27.7%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-178
Status
published
Products (2)
jupyter/jupyterlab-git
< 0.54.0
jupyterlab/jupyterlab-git
< 0.54.0
Published
Jul 08, 2026
Tracked Since
Jul 09, 2026