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CVE-2026-45033

GitHub Copilot-cli path traversal

7.8 HIGHPublic exploitEPSS 0.38%
  1. Published13 May 2026

Description

GitHub Copilot CLI brings AI-powered coding assistance directly to your command line. Prior to 1.0.43, a security vulnerability has been identified in GitHub Copilot CLI where a malicious bare git repository nested inside a project directory can achieve arbitrary code execution when the agent performs git operations. By exploiting git's automatic bare repository discovery during directory traversal, an attacker can set core.fsmonitor or other executable config keys to run arbitrary commands without user awareness or approval. The vulnerability arises because git's core.fsmonitor config key (and 15+ similar keys such as core.hookspath, diff.external, merge.tool, etc.) can specify arbitrary shell commands that git will execute as part of normal operations like status, diff, or rev-parse. This vulnerability is fixed in 1.0.43.

CVSS 3.1 breakdown

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

Affected products

GitHub Copilot-cli< 1.0.43

Remediation

Fixed in
GitHub Copilot-cli≥ 1.0.43

References

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Frequently asked

Is CVE-2026-45033 being actively exploited?

CVE-2026-45033 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.38%.

How severe is CVE-2026-45033?

CVE-2026-45033 has a CVSS 3.1 base score of 7.8, rated high. EPSS estimates a 0.38% probability of exploitation.

Which products are affected by CVE-2026-45033?

Affected products include GitHub Copilot-cli.

How do I fix CVE-2026-45033?

Upgrade affected software to a fixed version, for example GitHub Copilot-cli 1.0.43 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-45033 against the real software inventory on every managed device, as each hourly inventory arrives. 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.