TI-2026-85617 Aliases CVE-2026-116779

Inbound SIP MESSAGE lets peers run FreeSWITCH API commands

MEDIUM 51CWE-749Published 2026-11-05 · Updated 2026-11-07

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-77.

Summary

FreeSWITCH before 1.11.3 treats the left side of the To user in an inbound SIP MESSAGE as a chat protocol selector (CWE-78). Selecting the api chat protocol passes the message to the API executor, so a peer whose MESSAGE is accepted can run FreeSWITCH API commands, including operating system commands, with the daemon's privileges. Inbound chat is enabled on the stock internal and external profiles, and any authenticated profile account is sufficient. Exploitation has been observed in the wild.

Written with Claude Haiku 5.5 from the sources below · 2026-11-05

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.01299 70th percentileScored 2026-11-07

Fix Fixed freeswitch (signalwire): 1.11.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
signalwire	freeswitch	before 1.11.3	1.11.3	Patch available	CNA

freeswitch Vendorsignalwire Affected before 1.11.3 Fixed in 1.11.3 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:freeswitch:freeswitch::::::::	—	—	freeswitch

cpe:2.3:a:freeswitch:freeswitch:*:*:*:*:*:*:*:* Versions — — ·freeswitch

Remediation

Upgrade FreeSWITCH to version 1.11.3, which fixes this issue.

Written with Claude Haiku 5.5 from the sources below · 2026-11-05

Fix · CNA freeswitch (signalwire) Fixed in 1.11.3

Timeline

2026-11-05 Threatist record created from CVE-2026-116779
2026-11-07 CISA SSVC decision points changed

References

Other 4

TI-2023-08915 heap-over-flow in stun_parse_attribute in sofia-sip CVSS 3.1CRITICAL 9.8
TI-2022-13049 Heap-based Buffer Overflow and Out-of-bounds Write in Sofia-SIP CVSS 3.1CRITICAL 9.8
TI-2023-28097 FreeSWITCH susceptible to Denial of Service via DTLS Hello packets during call initiation CVSS 3.1HIGH 7.5
TI-2023-20909 Resource allocation without limits in signalwire freeswitch CVSS 3.1HIGH 7.5
TI-2023-20908 FreeSWITCH allows remote users to trigger out of bounds write by offering an ICE candidate with unknown component ID CVSS 3.1HIGH 7.5
TI-2023-15601 heap-over-flow and integer-overflow in sofia-sip CVSS 3.1HIGH 7.5

See all 44 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences