How severe is CVE-2026-44237?

CVE-2026-44237 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2026-44237 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-44237?

CVE-2026-44237 affects Sangoma Freepbx. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-44237?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-44237 have an EU (EUVD) identifier?

Yes. CVE-2026-44237 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-33300.

When was CVE-2026-44237 published?

CVE-2026-44237 was published on 2026-05-29 and last updated on 2026-06-17.

CVE-2026-44237

CVE-2026-44237 is a high-severity vulnerability in Sangoma Freepbx with a CVSS 3.x base score of 8.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-1390.

Key facts

Severity: High (CVSS 3.x base score 8.1)
CVSS v4: 7.6
EPSS exploit prediction: 0% (10th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-33300
Weakness: CWE-1390
Affected product: Sangoma Freepbx
Published: 2026-05-29
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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.
How severe is CVE-2026-44237?: CVE-2026-44237 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2026-44237 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-44237?: CVE-2026-44237 affects Sangoma Freepbx. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-44237?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-44237 have an EU (EUVD) identifier?: Yes. CVE-2026-44237 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-33300.
When was CVE-2026-44237 published?: CVE-2026-44237 was published on 2026-05-29 and last updated on 2026-06-17.

References

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

Affected products (1)

cpe:2.3:a:sangoma:freepbx:*:*:*:*:*:*:*:*

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