CVE-2026-44237
HIGHFreePBX: Authenticated Access can lead to Subsequent OAuth2 Authentication Bypass in API Module
Title source: cnaDescription
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.
References (1)
Core 1
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/FreePBX/security-reporting/security/advisories/GHSA-vgjf-4h63-8vcc
Scores
CVSS v3
8.1
EPSS
0.0020
EPSS Percentile
10.0%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
total
Details
CWE
CWE-1390
Status
published
Products (2)
FreePBX/security-reporting
< 17.0.8
sangoma/freepbx
< 17.0.8
Published
May 29, 2026
Tracked Since
May 29, 2026