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

CVE-2026-44237

FreePBX: Authenticated Access can lead to Subsequent OAuth2 Authentication Bypass in API Module PUBLISHED

Description (CNA)

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 (CNA)

Vendor / product	Versions
FreePBX / security-reporting	affected < 17.0.8

CWE

CWE-1390

References

https://github.com/FreePBX/security-reporting/security/advisories/GHSA-vgjf-4h63-8vcc

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.