Command injection in freeswitch - CVE-2026-116786
Published: November 9, 2026
Vulnerability identifier: #VU162774
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-116786
CWE-ID: CWE-77
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote authenticated attacker to execute operating system commands with the privileges of the FreeSWITCH process.
The vulnerability exists due to unescaped SIP Refer-To values entering an outbound channel-variable block in mod_sofia when REFER names an unknown dialog. A remote authenticated attacker with a registered account participating in a bridged call can inject comma-separated variables through REFER to trigger shell execution without another user's cooperation.
Affected software
freeswitch
How to mitigate CVE-2026-116786
Install security update from vendor's website.
freeswitch - update to 1.11.2