CVE-2026-54528

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.

CVSS v3 7.1 HIGH

7.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 4.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/jupyterlab/jupyterlab-git/commit/460035275b5963dc96e364e60ba6a73717fbd033	Patch
https://github.com/jupyterlab/jupyterlab-git/releases/tag/v0.54.0	Release Notes
https://github.com/jupyterlab/jupyterlab-git/security/advisories/GHSA-436q-jwfr-rm2h	Exploit Vendor Advisory
https://github.com/jupyterlab/jupyterlab-git/security/advisories/GHSA-436q-jwfr-rm2h	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:jupyter:jupyterlab-git:*:*:*:*:*:*:*:*

History

25 Oct 2026, 17:10

Type	Values Removed	Values Added
Summary		(es) JupyterLab Git es una extensión de Git para JupyterLab. Antes de la versión 0.54.0, jupyterlab-git utiliza fnmatch.fnmatchcase() en GitHandler.prepare() en jupyterlab_git/handlers.py para aplicar excluded_paths, permitiendo a un usuario autenticado en un sistema de archivos que no distingue entre mayúsculas y minúsculas variar el uso de mayúsculas y minúsculas en la ruta de la URL y leer directorios excluidos. Este problema está solucionado en la versión 0.54.0.

Information

Published : 2026-07-08 21:16

Updated : 2026-10-25 17:10

NVD link : CVE-2026-54528

Mitre link : CVE-2026-54528

CVE.ORG link : CVE-2026-54528

JSON object : View

Products Affected

jupyter

jupyterlab-git

CWE

CWE-178

Improper Handling of Case Sensitivity

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