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CVE-2026-40520

FreePBX api module Command Injection via GraphQL

CVSS 4.0 8.6 HIGHCVSS 3.1 7.2 HIGHCheck source for fixed versionsKEV status unknown

Original advisory

Historical advisory recorded 23 Oct 2026 15:48:27 UTC. Read the latest advisory.

cve-program · CVE-2026-40520

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-40520

Published

api

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "FreePBX",
                    "product": "api",
                    "repo": "https://github.com/FreePBX/api",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "0",
                            "lessThanOrEqual": "17.0.8",
                            "versionType": "semver"
                        },
                        {
                            "status": "unaffected",
                            "version": "5f194e39a47e5481e8947f9694304d32724175f6",
                            "versionType": "git"
                        }
                    ],
                    "defaultStatus": "unaffected",
                    "packageURL": "pkg:github/FreePBX/api"
                }

Original source record · Cite this exact observation · Complete original publisher JSON