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CVE-2026-108953— mac-shell-mcp before 2.0.0 OS Command Injection via execute_command Arguments

Quick assessment

Affected
cfdude mac-shell-mcp
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

mac-shell-mcp 在 2.0.0 版本之前存在一个操作系统命令注入漏洞，该漏洞允许 MCP 客户端通过在 参数中注入 shell 元字符来绕过命令白名单。攻击者或恶意提示词可以利用安全命令（如 ），并传入类似 的参数，从而在未经批准的情况下以服务器用户的身份执行被禁止的命令。

CVSS 7.8 · High

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 1

VendorProduct Version RangeStatus
cfdude mac-shell-mcp < 2.0.0 affected
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I. Basic Information for CVE-2026-108953

Vulnerability Information
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Vulnerability Title
mac-shell-mcp before 2.0.0 OS Command Injection via execute_command Arguments
Source: CVE Program / CVE List V5
Vulnerability Description
mac-shell-mcp before 2.0.0 contains an OS command injection vulnerability that allows MCP clients to bypass the command whitelist by injecting shell metacharacters into execute_command arguments. Attackers or malicious prompts can call a safe command such as pwd with arguments like ';' to run forbidden commands as the server user without approval.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
cfdude mac-shell-mcp 0 ~ 2.0.0 -

II. Public POCs for CVE-2026-108953

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III. Intelligence Information for CVE-2026-108953

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Patches & Fixes for CVE-2026-108953 (1)

Vendor Advisories for CVE-2026-108953 (2)

Other References for CVE-2026-108953 (1)

IV. Related Vulnerabilities

Same weakness: CWE-78

V. Comments for CVE-2026-108953

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