# CVE-2026-116789: FreeSWITCH: DTLS-SRTP peer certificate is not bound to the SDP fingerprint when FreeSWITCH is the DTLS server


- **Severity:** High 7.4 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Fix available:** No
- **Published:** 5 Nov 2026
- **Updated:** 9 Nov 2026
- **Also known as:** GHSA-8ghv-ccjr-4cx9

## What is CVE-2026-116789?

CVE-2026-116789 is a high-severity vulnerability in signalwire freeswitch, published on 5 Nov 2026. 

### Official 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 1.11.2, dtls_state_setup() compared a peer certificate with the SDP a=fingerprint only when FreeSWITCH was the DTLS client, not when it held the DTLS server role. An unauthenticated peer able to reach the negotiated media port could complete the DTLS-SRTP handshake with an unrelated certificate, obtain the leg's SRTP keys, decrypt and inject media, and displace the legitimate endpoint; on ICE-enabled legs the peer also needs the connectivity-check credentials from SDP, which generally requires signaling visibility or a position on its path. WebRTC and SIP DTLS-SRTP legs are affected whenever the peer selects the active role, while FreeSWITCH client-role handshakes already perform fingerprint validation. Version 1.11.2 introduces the remediation, which requires rtp_dtls_client_cert_verify_mode=fingerprint.

Weakness: CWE-300 (Channel Accessible by Non-Endpoint), CWE-295 (Improper Certificate Validation)

## Which versions are affected by CVE-2026-116789?

It affects 1 product.


Products: Freeswitch.

## How do I fix CVE-2026-116789?

No fix has been published for CVE-2026-116789 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-116789 being exploited?

There is no known exploitation of CVE-2026-116789 in the wild and no public exploit code.

## Other vulnerabilities in signalwire freeswitch

- [CVE-2026-116779](https://insights.sbomify.com/CVE-2026-116779/): SignalWire FreeSwitch Code Injection (critical 9.8, exploited in the wild)
- [CVE-2026-49841](https://insights.sbomify.com/CVE-2026-49841/): FreeSWITCH: Pre-authentication heap buffer overflow in `mod_verto` HTTP POST body read (critical 9.8)
- [CVE-2019-19492](https://insights.sbomify.com/CVE-2019-19492/): FreeSWITCH 1.6.10 through 1.10.1 has a default password in event_socket.conf.xml. (critical 9.8)
- [CVE-2026-116785](https://insights.sbomify.com/CVE-2026-116785/): FreeSWITCH: Pre-authentication heap out-of-bounds write in mod_xml_rpc WebSocket frame length handling (critical 9.1)
- [CVE-2026-116790](https://insights.sbomify.com/CVE-2026-116790/): FreeSWITCH: Inbound ICE connectivity checks are accepted without verifying STUN MESSAGE-INTEGRITY (critical 9.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-116789 and fix it if it is affected.

What it is: CVE-2026-116789 is a high-severity vulnerability in signalwire freeswitch, published on 5 Nov 2026. 
Exploitation: There is no known exploitation of CVE-2026-116789 in the wild and no public exploit code.

Affected product: signalwire freeswitch. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-116789/ (Markdown: https://insights.sbomify.com/CVE-2026-116789/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-116789
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-116789
- OSV: https://osv.dev/vulnerability/CVE-2026-116789

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-116789/
Summaries are generated and may contain mistakes; the official description above is the record.