SIP Messaging Vulnerability in FreeSWITCH by SignalWire
CVE-2026-116779

9.8CRITICAL

Key Information:

Vendor

Signalwire

Status
Freeswitch
Vendor
CVE Published:
5 November 2026

What is CVE-2026-116779?

Prior to version 1.11.3, FreeSWITCH is susceptible to a vulnerability in the sofia_presence_handle_sip_i_message() function that mishandles the parsing of SIP MESSAGE requests. By improperly splitting the 'To' user on a plus sign, it allows attackers to leverage the chat protocol selector. This exploitation can enable unauthorized execution of FreeSWITCH API commands, which include executing operating-system commands with elevated privileges. The vulnerability affects both authenticated and unauthenticated users under certain configurations, facilitating attacks that can lead to configuration leaks, credential exposure, arbitrary call control, and unauthorized command execution. This deficiency has been observed in active exploitation in the field. The issue has been addressed in version 1.11.3.

Affected Version(s)

freeswitch < 1.11.3

References

https://github.com/signalwire/freeswitch/security/advisor...
x_refsource_CONFIRM
https://github.com/signalwire/freeswitch/pull/3135
x_refsource_MISC
https://github.com/signalwire/freeswitch/commit/7015f6a73...
x_refsource_MISC

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.