jupyterlab-git excluded_paths Case-Sensitivity Bypass Allows Reading Excluded Directories (CVE-2026-54528) | HOL Guard CVE

High · CVSS 7.1CVE-2026-54528GHSA-436Q-JWFR-RM2H

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

Answer in brief

CVE-2026-54528 records a High severity (CVSS 7.1) vulnerability in jupyterlab-git excluded_paths Case-Sensitivity Bypass Allows Reading Excluded Directories. The current sources do not mark it as known exploited. The current feed maps jupyterlab/jupyterlab-git (generic), jupyterlab-git (pip). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Jul 8, 2026Updated Jul 10, 2026Source checked Sep 17, 2026First seen by HOL Jun 19, 2026Material review Jul 10, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.1
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 7.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps jupyterlab/jupyterlab-git (generic), jupyterlab-git (pip). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
jupyterlab/jupyterlab-gitgeneric	< 0.54.0	Not reported
jupyterlab-gitpip	<=0.53.0	0.54.0

Recommended response

Check inventory. Check lockfiles and deployed manifests for jupyterlab/jupyterlab-git, jupyterlab-git.
Review the reported fix. Update jupyterlab-git to 0.54.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Jul 8, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Jul 10, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Jun 19, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.