CVE-2026-44237: FreePBX is an open source IP PBX

Q: How do I fix CVE-2026-44237?

freepbx: upgrade to 17.0.8. Exact commands for each OS are on this page.

Q: Is CVE-2026-44237 being exploited?

CVE-2026-44237 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-44237 affect?

CVE-2026-44237 affects freepbx. Severity is high (CVSS 8.1). 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() meth

This month

HIGH 8.1UPGRADE

CVE-2026-44237 is a high-severity flaw (CVSS 8.1) affecting freepbx. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	2.7% (top 14%)
CISA exploited list	No
Weakness	CWE-1390
Published	2026-05-29
Last modified	2026-07-21

Publisher (CNA): GitHub, Inc. · Vendor: sangoma

Last updated 2026-07-21 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-29 14:16 UTCPublished CVE record published
2026-07-21 12:10 UTCUpdated Record last modified

sangoma freepbx UPGRADE

Affected: < 17.0.8

Fixed in: 17.0.8

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy freepbx || rpm -q freepbx || freepbx --version

2. UPGRADE to 17.0.8 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade freepbx

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade freepbx

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-44237?

freepbx: upgrade to 17.0.8. Exact commands for each OS are on this page.

Is CVE-2026-44237 being exploited?

CVE-2026-44237 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-44237 affect?

CVE-2026-44237 affects freepbx. Severity is high (CVSS 8.1). 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() meth

How urgent is CVE-2026-44237?

Priority 50/100. High severity

Software pages

PHP vulnerabilities

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References

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