CVE-2026-40520— FreePBX api module Command Injection via GraphQL
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I. Basic Information for CVE-2026-40520
Vulnerability Information
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Vulnerability Title
FreePBX api module Command Injection via GraphQL
Source: NVD (National Vulnerability Database)
Vulnerability Description
FreePBX api module version 17.0.8 and prior contain a command injection vulnerability in the initiateGqlAPIProcess() function where GraphQL mutation input fields are passed directly to shell_exec() without sanitization or escaping. An authenticated user with a valid bearer token can send a GraphQL moduleOperations mutation with backtick-wrapped commands in the module field to execute arbitrary commands on the underlying host as the web server user.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
Vulnerability Title
FreePBX api 操作系统命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
FreePBX api是FreePBX开源的一个插件。 FreePBX api module 17.0.8及之前版本存在操作系统命令注入漏洞，该漏洞源于initiateGqlAPIProcess函数中GraphQL mutation输入字段未经清理或转义直接传递给shell_exec，可能导致具有有效承载令牌的认证用户执行任意命令。
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
II. Public POCs for CVE-2026-40520
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IV. Related Vulnerabilities
Same vendor: FreePBX
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FreePBX: Authenticated Remote Code Execution via Recordings - CVE-2026-28284
FreePBX: Authenticated SQL Injection Vulnerabilities in Free - CVE-2026-28210
FreePBX: Authenticated SQL Injection in CDR (Call Data Recor - CVE-2026-28209
FreePBX: Command Injection leading to Remote Code Execution - CVE-2025-55210
FreePBX API has a Privilege Escalation Error in GraphQL Allo
Same weakness: CWE-78
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