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CVE-2026-54528

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

Published: Jul 8, 2026Updated: Jul 15, 2026 Sources: CVE List NVDCWE-178
7.1HIGH
NVD MITRE
EPSS Score
0.4%
Top 72.3%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:HI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-178

Affected Products

jupyter
oss-projectaka jupyterlab, notebook, jupyter server
jupyterlab-gitMixed
AI / ML / notebook-mlops
jupyterlab
oss-projectaka jupyter lab
jupyterlab-gitOn-prem
DevTools & CI / ide-editor

Exploitability

Official Patch Available
Is your org exposed to CVE-2026-54528?We can run the check for you — a free external exposure review, no install. Check my exposure

References

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

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