CVE-2026-44237

Name: CVE-2026-44237
Creator: NVD / NIST
Published: 2026-05-29T14:16:27.06+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.6/10EPSS 0.20%

Last modified Jun 17, 2026

CVE-2026-44237 is a high-severity vulnerability rated 7.6/10 on the CVSS scale. 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. EPSS estimates a 0.20% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

8.1/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

CVSS 4.0

7.6/10

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.20%

10.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-1390

Affected Software

Vendor	Product	Versions
Sangoma	Freepbx	< 17.0.8

References

https://github.com/FreePBX/security-reporting/security/advisories/GHSA-vgjf-4h63-8vccMitigation, Vendor Advisory

Timeline

Published: May 29, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-44237?

How severe is CVE-2026-44237?

CVE-2026-44237 has a CVSS score of 7.6/10 (HIGH severity). The EPSS model estimates a 0.20% probability of exploitation in the next 30 days.

How do I fix CVE-2026-44237?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-44237?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST