CVE-2026-44237— FreePBX: Authenticated Access can lead to Subsequent OAuth2 Authentication Bypass in API Module
Possible ATT&CK Techniques 2AI
T1190 · Exploit Public-Facing Application T1078.001 · Default AccountsAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| FreePBX | security-reporting | < 17.0.8 | affected |
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I. Basic Information for CVE-2026-44237
Vulnerability Information
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Vulnerability Title
FreePBX: Authenticated Access can lead to Subsequent OAuth2 Authentication Bypass in API Module
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
CWE-1390
Source: NVD (National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| FreePBX | security-reporting | < 17.0.8 | - |
II. Public POCs for CVE-2026-44237
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-44237 (1)
Same Patch Batch · FreePBX · 2026-05-29 · 4 CVEs total
| CVE-2026-46376 | FreePBX: Unauthenticated Use of Hard-Coded Credentials Vulnerability in FreePBX UCP Interf | |
| CVE-2026-44239 | FreePBX: Authenticated Local File Inclusion in Dashboard Module | |
| CVE-2026-44238 | FreePBX: Authenticated SQL Injection via ORDER BY in CDR Reports |
IV. Related Vulnerabilities
Same product: security-reporting
- CVE-2026-44238
FreePBX: Authenticated SQL Injection via ORDER BY in CDR Rep - CVE-2026-44239
FreePBX: Authenticated Local File Inclusion in Dashboard Mod - CVE-2026-46376
FreePBX: Unauthenticated Use of Hard-Coded Credentials Vulne - CVE-2026-26978
Free PBX backup: Deserialization of Untrusted Data in admin/ - CVE-2026-28287
FreePBX: Authenticated Remote Code Execution via Recordings
Same vendor: FreePBX
- CVE-2026-44238
FreePBX: Authenticated SQL Injection via ORDER BY in CDR Rep - CVE-2026-44239
FreePBX: Authenticated Local File Inclusion in Dashboard Mod - CVE-2026-46376
FreePBX: Unauthenticated Use of Hard-Coded Credentials Vulne - CVE-2026-26978
Free PBX backup: Deserialization of Untrusted Data in admin/ - CVE-2026-40520
FreePBX api module Command Injection via GraphQL
Same weakness: CWE-1390
- CVE-2026-49323
Indian Scout Bobber 2025 WCM-to-ECM weak authentication - CVE-2026-49322
Indian Scout Bobber 2025 Infotainment-to-WCM weak authentica - CVE-2026-40417
Microsoft Dynamics 365 Business Central Elevation of Privile - CVE-2026-0204
SonicWALL SonicOS 访问控制错误漏洞 - CVE-2026-6886
BorG Technology Corporation｜Borg SPM 2007 - Authentication B
V. Comments for CVE-2026-44237
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