SignalWire FreeSWITCH up to 1.11.2 SIP Message sofia_presence_handle_sip_i_message os command injection

Summaryinfo

A vulnerability was found in SignalWire FreeSWITCH up to 1.11.2. It has been declared as very critical. Affected by this vulnerability is the function sofia_presence_handle_sip_i_message of the component SIP Message Handler. The manipulation results in os command injection. This vulnerability is known as CVE-2026-116779. It is possible to launch the attack remotely. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as very critical has been found in SignalWire FreeSWITCH up to 1.11.2. Affected is the function sofia_presence_handle_sip_i_message of the component SIP Message Handler. The manipulation with an unknown input leads to a os command injection vulnerability. CWE is classifying the issue as CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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 1.11.3, sofia_presence_handle_sip_i_message() split the To user of an inbound SIP MESSAGE on a plus sign and treated the left side as a chat protocol selector. Selecting the api chat proto reached switch_api_execute(), allowing a peer whose MESSAGE was accepted to run FreeSWITCH API commands, including operating-system command sinks, with the daemon's privileges. Inbound chat is enabled on the stock internal and external profiles, and any authenticated profile account is sufficient; stock directory users without password material can also remove that barrier in affected configurations. The flaw permits configuration and credential disclosure, arbitrary call control, and command execution, and exploitation has been observed in the wild. This issue is fixed in version 1.11.3.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-116779 since 10/26/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 11/05/2026). The MITRE ATT&CK project declares the attack technique as T1202.

Upgrading to version 1.11.3 eliminates this vulnerability.

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Productinfo

Vendor

• SignalWire

Name

• FreeSWITCH

Version

• 1.11.0
• 1.11.1
• 1.11.2

Website

• Product: https://github.com/signalwire/freeswitch/

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