CVEs / CVE-2026-116779
CVE-2026-116779: SignalWire FreeSwitch Code Injection Vulnerability
- Known exploited in the CISA KEV catalog since 9 Nov 2026
- critical 9.8 CVSS 3.1 (from the CNA)
- EPSS 1.29% chance of exploitation in the next 30 days, higher than 70% of CVEs (9 Nov 2026)
- Last changed at its sources
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Summary
SignalWire FreeSwitch contains a code injection vulnerability that permits configuration and credential disclosure, arbitrary call control, and command execution.
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.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| signalwire freeswitch | < 1.11.3 | — |
Exploitation
| In CISA KEV since | 9 Nov 2026 |
|---|---|
| Due date for US federal agencies | 12 Nov 2026 |
| Used in ransomware campaigns | Unknown |
| Required action | Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines. |
Severity
| CVSS 3.1 | 9.8 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HScored by the CNA ([email protected]) |
|---|---|
| Weakness | CWE-77, CWE-78, CWE-749 |
On the Stackurity blog
References
- CVE-2026-116779 on NVD
- CVE-2026-116779 in the CISA KEV catalog
- https://github.com/signalwire/freeswitch/security/advisories/GHSA-mg63-h38w-8p9p (cited by CISA)
- https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk (cited by CISA)
- https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk (cited by CISA)
- CVE-2026-116779 on OSV
- https://github.com/signalwire/freeswitch/commit/7015f6a73ab3d67fed5fbfc277ecfb88a74c2a86 Patch
- https://github.com/signalwire/freeswitch/pull/3135 Patch
- https://github.com/signalwire/freeswitch/releases/tag/v1.11.3 Release Notes
- https://github.com/signalwire/freeswitch/security/advisories/GHSA-mg63-h38w-8p9p Mitigation, Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-116779 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.