PT-2026-33931 · Freepbx · Api

Published 2026-04-21 · Updated 2026-04-21 · CVE-2026-40520

NVD

CVSS v3.1

7.2

High

AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

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.

Fix

OS Command Injection

Weakness Enumeration

CWE-78

Related Identifiers

CVE-2026-40520

Affected Products

Api

References · 5

• https://github.com/FreePBX/api/commit/5f194e39a47e5481e8947f9694304d32724175f6 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-40520 · Security Note
• https://vulncheck.com/advisories/freepbx-api-module-command-injection-via-graphql · Note
• https://github.com/FreePBX/api/blob/5f194e39a47e5481e8947f9694304d32724175f6/Api.class.php#L546C1-L554C3 · Note
• https://github.com/FreePBX/api/blob/5f194e39a47e5481e8947f9694304d32724175f6/ApiGqlHelper.class.php#L34C1-L36C136 · Note