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Vulnerability record · CVE-2026-54528 · published 8 July 2026

CVE-2026-54528: Jupyterlab-git vulnerability

Jupyter · Jupyterlab Git

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.

7.1 CVSS 3.1 High EPSS 0.41% · top 67.3% CWE-178 · CWE-178
7.1CVSS 3.1 base score
0.41%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References, 2 tagged exploit
15 Jul 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
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 ExploitVendor Advisory
https://github.com/jupyterlab/jupyterlab-git/security/advisories/GHSA-436q-jwfr-rm2h ExploitVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.3CVE-2026-54527Jupyterlab-git cross-site scripting vulnerabilityJupyterLab Git is a Git extension for JupyterLab. From 0.30.0b3 before 0.54.0, the PlainTextDiff.ts createHeader() method passes Git filenames direct…EPSS 0.53%9.8CVE-2020-12812FortiOS SSL VPN two-factor authentication bypass via username case changeFortiOS SSL VPN fails to enforce the second authentication factor (FortiToken) when a user alters the letter case of their username. Because the user…KEVEPSS 49%analysed

Source: NIST National Vulnerability Database (record CVE-2026-54528), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.