CVE-2026-27735— mcp-server-git : Path traversal in git_add allows staging files outside repository boundaries
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I. Basic Information for CVE-2026-27735
Vulnerability Information
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Vulnerability Title
mcp-server-git : Path traversal in git_add allows staging files outside repository boundaries
Source: NVD (National Vulnerability Database)
Vulnerability Description
Model Context Protocol Servers is a collection of reference implementations for the model context protocol (MCP). In mcp-server-git versions prior to 2026.1.14, the git_add tool did not validate that file paths provided in the files argument were within the repository boundaries. Because the tool used GitPython's repo.index.add() rather than the Git CLI, relative paths containing `../` sequences that resolve outside the repository were accepted and staged into the Git index. Users are advised to upgrade to 2026.1.14 or newer to remediate this issue.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Model Context Protocol Servers 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Model Context Protocol Servers是Model Context Protocol开源的一个大模型上下文协议服务器。 Model Context Protocol Servers 2026.1.14之前版本存在路径遍历漏洞，该漏洞源于git_add工具未验证文件路径是否在仓库边界内，可能导致路径遍历攻击。
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 |
|---|---|---|---|---|
| modelcontextprotocol | servers | < 2026.1.14 | - |
II. Public POCs for CVE-2026-27735
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|---|
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IV. Related Vulnerabilities
Same product: servers
- CVE-2025-68145
mcp-server-git has missing path validation when using --repo - CVE-2025-68144
mcp-server-git argument injection in git_diff and git_checko - CVE-2025-68143
mcp-server-git's unrestricted git_init tool allows repositor - CVE-2025-53109
Model Context Protocol Servers Vulnerable to Path Validation - CVE-2025-53110
Model Context Protocol Servers Vulnerable to Path Validation
Same vendor: modelcontextprotocol
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MCP Ruby SDK: Insufficient Session Binding Allows SSE Stream - CVE-2026-33252
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Same weakness: CWE-22
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V. Comments for CVE-2026-27735
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