{"id":"CVE-2026-73665","title":"FreePBX is an open source IP PBX","summary":"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…","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-862"],"vendor":"sangoma","product":"freepbx","affected":["freepbx < 17.0.9"],"patched":["freepbx 17.0.9"],"published":"2026-08-13","updated":"2026-10-09","sourceUpdated":"2026-10-09T19:29:45.570","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-73665","references":[{"url":"https://github.com/FreePBX/security-reporting/security/advisories/GHSA-37j8-fhxx-9vhp","label":"security-advisories@github.com"}],"tags":["nvd"],"epss":0.00331,"epssPercentile":0.26087,"ingestedAt":"2026-09-10T21:05:53.596Z","slug":"CVE-2026-73665","body":"## Overview\n\nFreePBX 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.\n\n## Affected\n\n- `freepbx < 17.0.9`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `freepbx 17.0.9`","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":53.9,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":218611,"id":"CVE-2026-73665","ts":1791576723599,"field":"cvss","old":null,"new":"9.8"},{"seq":218610,"id":"CVE-2026-73665","ts":1791576723599,"field":"severity","old":"none","new":"critical"}]}