github.comConfirmation
https://github.com/FreePBX/security-reporting/security/advisories/GHSA-37j8-fhxx-9vhp CVE-2026-73665
CRITICAL
FreePBX UCP: Unauthenticated remote code execution via socket.io namespace auth bypass and AMI action injection
Record summary
CVE-2026-73665 has a selected CVSS score of 9.3 (critical).
Description
FreePBX is an open source IP PBX. Prior to 17.0.9, the UCP Node server on ports 8001 and 8003 uses io.use(checkAuth) in node/lib/server.js, but Socket.IO version 4 applies that middleware only to the default namespace. An unauthenticated client can connect to custom namespaces that do not consistently invoke checkAuth in node/lib/auth.js and send crafted event values containing carriage-return or newline characters through the Asterisk Manager Interface action path patched by node/lib/asterisk-manager-patch.js, allowing arbitrary commands to execute as the asterisk service user. This issue is fixed in version 17.0.9.
Description source: CVE List
Affected products and versions
1| Product | Source | Version range | Status |
|---|---|---|---|
| CVE List | < 17.0.9 | affected |