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CVE-2026-116779— FreeSWITCH: Inbound SIP MESSAGE can select the api chat proto and run FreeSWITCH API commands

Quick assessment

Affected
signalwire freeswitch
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

FreeSWITCH 是一个软件定义的电信栈，旨在推动从专有电信交换机向可在任何通用硬件上运行的软件实现进行数字化转型。在 1.11.3 版本之前， 函数在处理入站 SIP MESSAGE 时，会按加号（+）分割"To"字段中的用户部分，并将加号左侧的内容视为聊天协议选择器。攻击者可通过选择"api chat proto"触发 ，从而使消息被接受的对端能够以守护进程的权限执行 FreeSWITCH API 命令，包括操作系统命令注入。默认的内部和外部配置文件已启用入站聊天功能；任何已认证的配置账户均可利用此漏洞，而

CVSS 9.8 · Critical

Affected Version Matrix 1

VendorProduct Version RangeStatus
signalwire freeswitch < 1.11.3 affected
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I. Basic Information for CVE-2026-116779

Vulnerability Information
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Vulnerability Title
FreeSWITCH: Inbound SIP MESSAGE can select the api chat proto and run FreeSWITCH API commands
Source: CVE Program / CVE List V5
Vulnerability 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 1.11.3, 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
在命令中使用的特殊元素转义处理不恰当(命令注入)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
signalwire freeswitch < 1.11.3 -

II. Public POCs for CVE-2026-116779

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III. Intelligence Information for CVE-2026-116779

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Other References for CVE-2026-116779 (4)

Same Patch Batch · signalwire · 2026-11-05 · 21 CVEs total

CVE-2026-116790 9.1 CRITICAL FreeSWITCH: Inbound ICE connectivity checks are accepted without verifying STUN MESSAGE-IN
CVE-2026-116785 9.1 CRITICAL FreeSWITCH: Pre-authentication heap out-of-bounds write in mod_xml_rpc WebSocket frame len
CVE-2026-116786 8.8 HIGH FreeSWITCH: Channel-variable injection via SIP REFER leads to command execution in mod_sof
CVE-2026-116783 8.2 HIGH FreeSWITCH mod_spandsp: out-of-bounds write parsing UDPTL error-recovery data
CVE-2026-116788 8.2 HIGH FreeSWITCH: Pre-authentication heap buffer overflow in core XML empty-entity decoding
CVE-2026-116787 7.5 HIGH FreeSWITCH: Pre-authentication process termination in the Event Socket via an unbounded Co
CVE-2026-116782 7.5 HIGH FreeSWITCH: Pre-authentication invalid pointer dereference in mod_rtmp connect command han
CVE-2026-116784 7.5 HIGH FreeSWITCH: Out-of-bounds read in RTCP NACK feedback parsing
CVE-2026-115928 7.5 HIGH FreeSWITCH: Stack buffer overflow parsing the SDP a=crypto key material on inbound calls
CVE-2026-116570 7.5 HIGH FreeSWITCH: Pre-authentication stack buffer overflow in mod_xml_rpc HTTP directory authent
CVE-2026-116567 7.5 HIGH FreeSWITCH: Pre-authentication stack buffer overflow in mod_rtmp control-message handling
CVE-2026-116568 7.5 HIGH FreeSWITCH: Out-of-bounds read in mod_rtmp H.264 video message parsing
CVE-2026-116569 7.5 HIGH FreeSWITCH: Pre-authentication out-of-bounds write in MSRP message body parsing
CVE-2026-116789 7.4 HIGH FreeSWITCH: DTLS-SRTP peer certificate is not bound to the SDP fingerprint when FreeSWITCH
CVE-2026-116573 6.5 MEDIUM FreeSWITCH mod_sofia: stack buffer overflow from an over-long SIP To-header user
CVE-2026-116572 6.5 MEDIUM FreeSWITCH mod_sofia: stack buffer overflow from an over-long SIP Contact display-name
CVE-2026-116571 5.9 MEDIUM FreeSWITCH: Stack buffer overflow in mod_rtmp AVC sequence-header construction
CVE-2026-116574 5.9 MEDIUM FreeSWITCH: Off-by-one heap write in core XML serialization of four-byte UTF-8 sequences
CVE-2026-116781 5.3 MEDIUM FreeSWITCH: Pre-authentication out-of-bounds writes in mod_xml_rpc WebSocket frame parsing
CVE-2026-116780 2.7 LOW FreeSWITCH: Heap out-of-bounds read in FreeSWITCH core variable expansion via `${variable:

IV. Related Vulnerabilities

Same product: freeswitch
Same vendor: signalwire
Same weakness: CWE-77