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CVE-2026-54528

Jupyter Jupyterlab-git vulnerability

7.1 HIGHPublic exploitEPSS 0.41%
  1. Published8 Jul 2026

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 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityLow
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N

Affected products

Jupyter Jupyterlab-git< 0.54.0

Remediation

Fixed in
Jupyter Jupyterlab-git≥ 0.54.0

References

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Frequently asked

Is CVE-2026-54528 being actively exploited?

CVE-2026-54528 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.41%.

How severe is CVE-2026-54528?

CVE-2026-54528 has a CVSS 3.1 base score of 7.1, rated high. EPSS estimates a 0.41% probability of exploitation.

Which products are affected by CVE-2026-54528?

Affected products include Jupyter Jupyterlab-git.

How do I fix CVE-2026-54528?

Upgrade affected software to a fixed version, for example Jupyter Jupyterlab-git 0.54.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-54528 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.