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CVE-2026-85660— cli-mcp-server 0.2.5 Command Allowlist Bypass via Shell Substitution

Quick assessment

Affected
MladenSU cli-mcp-server
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.

MladenSU CLI MCP Server是MladenSU个人开发者的一个提供模型上下文协议服务的命令行接口服务器。 MladenSU CLI MCP Server 0.2.5版本存在命令注入漏洞，该漏洞源于_validate_command_with_operators函数在启用ALLOW_SHELL_OPERATORS时存在命令允许列表绕过漏洞，攻击者可通过shell命令替换语法（如$(...)或反引号）绕过ALLOWED_COMMANDS验证，执行非允许列表中的命令。

CVSS 8.1 · High EPSS 0.47% · P39

Affected Version Matrix 1

VendorProduct Version RangeStatus
MladenSU cli-mcp-server ≤ 0.2.5 affected
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I. Basic Information for CVE-2026-85660

Vulnerability Information
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Vulnerability Title
cli-mcp-server 0.2.5 Command Allowlist Bypass via Shell Substitution
Source: CVE Program / CVE List V5
Vulnerability Description
cli-mcp-server 0.2.5 contains a command allowlist bypass vulnerability in the _validate_command_with_operators function when ALLOW_SHELL_OPERATORS is enabled. Attackers can use shell command substitution syntax like $(...) or backticks to execute non-allowlisted commands that bypass the ALLOWED_COMMANDS validation check.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
MladenSU CLI MCP Server 命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
MladenSU CLI MCP Server是MladenSU个人开发者的一个提供模型上下文协议服务的命令行接口服务器。 MladenSU CLI MCP Server 0.2.5版本存在命令注入漏洞，该漏洞源于_validate_command_with_operators函数在启用ALLOW_SHELL_OPERATORS时存在命令允许列表绕过漏洞，攻击者可通过shell命令替换语法（如$(...)或反引号）绕过ALLOWED_COMMANDS验证，执行非允许列表中的命令。
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
MladenSU cli-mcp-server 0 ~ 0.2.5 -

II. Public POCs for CVE-2026-85660

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III. Intelligence Information for CVE-2026-85660

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Vendor Advisories for CVE-2026-85660 (1)

Proof of Concept for CVE-2026-85660 (2)

Security Blog Posts for CVE-2026-85660 (1)

IV. Related Vulnerabilities

Same weakness: CWE-78

V. Comments for CVE-2026-85660

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