CVE-2026-117567
esp-mcp through commit 28afddf OS Command Injection via MCP Tool Parameters
- State
- Published
- Severity
- 8.5 High
- Published
- Oct 27, 2026
- Updated
- Oct 27, 2026
- Reserved
- Oct 27, 2026
Description
esp-mcp through commit 28afddf contains an OS command injection vulnerability that allows attackers to run arbitrary commands by supplying shell metacharacters in MCP tool parameters. Attackers influencing agent tool calls through prompt injection can inject metacharacters into target, port, project_path, or project_name values passed to asyncio.create_subprocess_shell, executing commands as the MCP server user.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.5 High | CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 7.8 High | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | VulnCheck |
Weaknesses
- CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Affected Products
| Product | Versions |
|---|---|
esp-mcphorw |
|
References
- GitHub Issue #49issue-tracking
- https://github.com/horw/esp-mcpproduct
- https://github.com/horw/esp-mcp/blob/28afddf9ff41ada117bb45fd49b526d3bf89749e/main.py#L80technical-description
- VulnCheck Advisory: esp-mcp through commit 28afddf OS Command Injection via MCP Tool Parametersthird-party-advisory
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