# CVE-2026-40520

> Vulnerability · severity: **HIGH** (CVSS 7.2).

## 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.

## Key facts

- **CVE ID:** CVE-2026-40520
- **Published:** 2026-04-21
- **CVSS severity:** HIGH
- **CVSS base score:** 7.2
- **CWE codes:** CWE-78

## Affected products

- `freepbx:api`

## Primary sources

- NIST NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-40520

## Citation

> AI Analytics. CVE-2026-40520. Retrieved 2026-07-20 from https://api.ai-analytics.org/cve/CVE-2026-40520. Derived from NIST NVD. Licensed CC0.

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