CVE-2026-44237

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

Published: May 29, 2026Updated: Jul 21, 2026 Sources: CVE List NVDCWE-1390

8.1HIGH

Description

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.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:LPrivileges Required

Low

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:HConfidentiality

High

I:HIntegrity

High

A:NAvailability

None

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Weaknesses

CWE-1390

Affected Products

sangoma

commercial·CAaka asterisk, certified asterisk, freepbx

freepbxOn-premWeb App

Communications / messaging-chat

FreePBX

oss-projectaka security-reporting, endpoint

security-reportingOn-prem

Communications / voip-telephony

Exploitability

Workaround Available

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References

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

github.com

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