CVE-2026-45033— GitHub Copilot CLI: Nested Bare Repository Can Execute Arbitrary Commands via core.fsmonitor
Possible ATT&CK Techniques 3AI
T1036 · Masquerading T1059 · Command and Scripting Interpreter T1546 · Event Triggered ExecutionAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| github | copilot-cli | < 1.0.43 | affected |
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I. Basic Information for CVE-2026-45033
Vulnerability Information
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Vulnerability Title
GitHub Copilot CLI: Nested Bare Repository Can Execute Arbitrary Commands via core.fsmonitor
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
不正确的行为次序
Source: NVD (National Vulnerability Database)
Vulnerability Title
GitHub Copilot CLI 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
GitHub Copilot CLI是GitHub开源的一个终端AI编程助手。 GitHub Copilot CLI 1.0.43之前版本存在安全漏洞，该漏洞源于恶意裸git仓库嵌套在项目目录中，当代理执行git操作时利用自动裸仓库发现设置可执行配置键，可能导致任意代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| github | copilot-cli | < 1.0.43 | - |
II. Public POCs for CVE-2026-45033
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|---|
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IV. Related Vulnerabilities
Same vendor: github
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Improper authorization fallback allows scoped user-to-server
V. Comments for CVE-2026-45033
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