---
id: CVE-2026-75600
title: FreePBX is an open source IP PBX
summary: >-
  FreePBX is an open source IP PBX. Prior to version 17.0.9, authenticated users
  who are authorized to access the GraphQL api module interface of FreePBX are
  able to execute arbitrary shell commands. Authenticated access to the api
  module …
severity: high
cvss: 8.6
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'
cwe:
  - CWE-78
vendor: FreePBX
product: security-reporting
affected:
  - security-reporting < 17.0.9
published: '2026-09-28'
updated: '2026-09-29'
sourceUpdated: '2026-09-29T04:17:57.513'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-75600'
references:
  - url: >-
      https://github.com/FreePBX/security-reporting/security/advisories/GHSA-79rg-3xp6-rqq6
    label: security-advisories@github.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-28T00:00:00+00:00'
cvssSource: cna
ingestedAt: '2026-09-28T18:17:54.312Z'
---

## Overview

FreePBX is an open source IP PBX. Prior to version 17.0.9, authenticated users who are authorized to access the GraphQL api module interface of FreePBX are able to execute arbitrary shell commands. Authenticated access to the api module is required. The PBX API module's documentation generator accepts an authenticated host parameter and uses it to build a shell command. The code path validates the generated OAuth access token before execution, but it does not validate or escape host. Compromise results in authenticated arbitrary shell command execution as the FreePBX web/PBX service user (typically asterisk.). This issue has been patched in version 17.0.9.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.