CVE-2026-44237: Sangoma FreePBX

High severity, CVSS 8.1. EPSS: 0.4% chance of exploitation in the next 30 days.

FreePBX is an open source IP PBX. Prior to 17.0.8, the FreePBX api module's OAuth2 implementation does not sufficiently validate client credentials during token issuance. Knowledge of a valid client_id is required. The validateClient() method in ClientRepository.php unconditionally returns true, allowing any party with knowledge of a valid client_id to obtain OAuth2 access tokens without providing the correct client_secret. This vulnerability is fixed in 17.0.8.

Affected products

• Sangoma FreePBX: before 17.0.8 (fixed in 17.0.8)

Published 2026-05-29. Last modified 2026-07-21.