What is CVE-2026-44237?

CVE-2026-44237 is a high-severity vulnerability in Freepbx Security-Reporting, classified under Weak Authentication. CVSS score: 8.1/10. Published 2026-05-29.

How severe is CVE-2026-44237?

High severity. CVSS v3 base score is 8.1 out of 10.

Vulnerability in Freepbx Security-Reporting

CVE-2026-44237

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.

Published 2026-05-29 · last modified 2026-07-21.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.004 (27.0th percentile), scored 2026-10-19.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 27th percentile — 27.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.004 · change: +0.001

Affected products

Freepbx Security-Reporting — versions < 17.0.8
Sangoma Freepbx

Weakness classification (CWE)

CWE-1390 — Weak Authentication

References

github.com/FreePBX/security-reporting/security/advisories/GHSA-vgjf-4h63-8vcc (Mitigation, Vendor Advisory)

Frequently asked questions

What is CVE-2026-44237?: CVE-2026-44237 is a high-severity vulnerability in Freepbx Security-Reporting, classified under Weak Authentication. CVSS score: 8.1/10. Published 2026-05-29.
How severe is CVE-2026-44237?: High severity. CVSS v3 base score is 8.1 out of 10.