CVE-2026-116786 FreeSWITCH: Channel-variable injection via SIP REFER leads to command execution in mod_sofia
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-116786?
CVE-2026-116786 is a high-severity vulnerability in signalwire freeswitch, published on 5 Nov 2026.
Official description
FreeSWITCH is a Software Defined Telecom Stack enabling the digital transformation from proprietary telecom switches to a software implementation that runs on any commodity hardware. Prior to 1.11.2, sofia_handle_sip_i_refer() placed raw Refer-To URI parameters and headers inside a sip_invite_params channel-variable block passed to switch_ivr_originate(). The originate parser treated a comma in the attacker-controlled value as a variable separator, allowing an authenticated caller on a bridged call to inject arbitrary variables into a newly originated leg. An injected execute_on_originate value could invoke the system dialplan application before answer and execute operating-system commands with the FreeSWITCH process privileges. SIP REFER is enabled by default, and the sender needs only a registered account and a call that takes the off-box transfer path, not administrative or Event Socket access. This issue is fixed in version 1.11.2.
Which versions are affected by CVE-2026-116786?
It affects 1 product.
Products include Freeswitch.
How do I fix CVE-2026-116786?
No fix has been published for CVE-2026-116786 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-116786 being exploited?
There is no known exploitation of CVE-2026-116786 in the wild and no public exploit code.
Other vulnerabilities in signalwire freeswitch
- CVE-2026-116779 SignalWire FreeSwitch Code Injection
- CVE-2026-49841 FreeSWITCH: Pre-authentication heap buffer overflow in `mod_verto` HTTP POST body read
- CVE-2019-19492 FreeSWITCH 1.6.10 through 1.10.1 has a default password in event_socket.conf.xml.
- CVE-2026-116785 FreeSWITCH: Pre-authentication heap out-of-bounds write in mod_xml_rpc WebSocket frame length handling
- CVE-2026-116790 FreeSWITCH: Inbound ICE connectivity checks are accepted without verifying STUN MESSAGE-INTEGRITY
Sources
Also known as GHSA-xjxm-9qx6-w3fj.