High 7.1Published Jul 8, 2026

CVE-2026-54528jupyterlab-git excluded_paths Case-Sensitivity Bypass Allows Reading Excluded Directories

Updated under an hour ago (Oct 26, 2026, 4:50 AM ET)

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It affects jupyterlab-git and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for jupyterlab-git

Exploited in the last 30 days

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: 7.1 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
Weakness (CWE): CWE-178
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Jul 9, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

jupyterlab jupyterlab-git jupyterlab:git (from the name)	before 0.54.0	CNA record
jupyter jupyterlab-git jupyter:jupyterlab-git	before 0.54.0	NVD

References

https://github.com/jupyterlab/jupyterlab-git/security/advisories/GHSA-436q-jwfr-rm2hx-refsource-confirm, exploit, vendor-advisory
https://github.com/jupyterlab/jupyterlab-git/commit/460035275b5963dc96e364e60ba6a73717fbd033x-refsource-misc, patch
https://github.com/jupyterlab/jupyterlab-git/releases/tag/v0.54.0x-refsource-misc, release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.