# CVE-2026-44237

## Summary

- **CVE ID:** CVE-2026-44237
- **Severity:** HIGH
- **CVSS Score:** 7.6 (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)
- **CWE:** CWE-1390
- **Published:** May 29, 2026
- **Last Modified:** May 30, 2026

## 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.

## Affected Products

- FreePBX — security-reporting (< 17.0.8)

## References

- [CNA](https://github.com/FreePBX/security-reporting/security/advisories/GHSA-vgjf-4h63-8vcc)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.20%
- **EPSS Percentile:** 10.0

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._