HOMEVULNERABILITIESCVE-2026-44237
HIGH

CVE-2026-44237

CWE-1390Published: May 29, 2026· Updated: Jun 1, 2026

8.1
CVSS v3.1
EPSS:0.04%probability of exploitation in 30 daysPercentile:11.8th

Official 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.

NVD Source

Technical Analysis

CVE-2026-44237 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), with a CVSS base score of 8.1.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Affected Vendors & Products

sangoma1 product
freepbx
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
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Official Patches & Advisories

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

All References (1)

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

Quick Facts

CVE IDCVE-2026-44237
CVSS Score8.1 / 10
SeverityHIGH
WeaknessCWE-1390
CISA KEVNo
EPSS (30d)0.04%
Affected1 vendor
PublishedMay 29, 2026

Related CVEs (CWE-1390)

CVE-2025-30412
10.0
CVE-2025-30411
10.0
CVE-2026-6886
9.8
CVE-2026-28710
9.8
CVE-2026-4828
8.2
CVE-2026-4924
8.2

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-44237 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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