CVE-2026-44237 HIGH

CVE-2026-44237: FreePBX: Authenticated Access can lead to Subsequent OAuth2 Authentication Bypass in API Module

Vendor Freepbx
Product security-reporting
Weakness CWE-1390
Published May 29, 2026
Last update May 30, 2026
View on NVD All CVEs

CVSS base score

7.6/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

May 29, 2026 CVE published
May 30, 2026 Record updated