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 clientid is required. The validateClient() method in ClientRepository.php unconditionally returns true, allowing any party with knowledge of a valid clientid to obtain OAuth2 access tokens without providing the correct client_secret. This vulnerability is fixed in 17.0.8.
{
"unresolved_ranges": [
{
"source": "AFFECTED_FIELD",
"extracted_events": [
{
"fixed": "17.0.8"
}
]
}
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44237.json",
"cna_assigner": "GitHub_M",
"cwe_ids": [
"CWE-1390"
]
}{
"source": "CPE_RANGE",
"cpe": "cpe:2.3:a:sangoma:freepbx:*:*:*:*:*:*:*:*",
"extracted_events": [
{
"introduced": "0"
},
{
"fixed": "17.0.8"
}
]
}