CVE WatchAug 13, 2026

CVE-2026-73665

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,

CVSS

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No CVSS

EPSS

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KEV

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Exploit Today

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0-100

Published: Aug 13, 2026 · Last modified: Aug 13, 2026 · CWE-862

EPSS · 30d

Not enough EPSS history yet.

Technical 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.

Official references

github.comhttps://github.com/FreePBX/security-reporting/security/advisories/GHSA-37j8-fhxx-9vhp

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