# CVE-2026-116782: FreeSWITCH RTMP AMF parsing null dereference

Source: https://junglewise.ai/threats/cve-2026-116782-freeswitch-is-a-software-defined-telecom-stack-enabling-the  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-05. Updated: 2026-11-05  
License: CC BY 4.0 with a link back

CVE-2026-116782 · Severity: high · CVSS 7.5 · Published 2026-11-05

FreeSWITCH is a software-based telephone exchange that manages voice and video communications. A flaw in its RTMP module allows unauthenticated remote attackers to crash the entire system and terminate all active calls by sending a malformed connection request. The mod_rtmp module must be explicitly enabled to be vulnerable, which is not the default configuration.

Technologies: [SignalWire FreeSWITCH](https://junglewise.ai/threats/technologies/freeswitch). Vendors: [SignalWire](https://junglewise.ai/threats/vendors/signalwire).

## Quick answers

**Is CVE-2026-116782 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-116782 being exploited in the wild.

**How severe is CVE-2026-116782?** High severity, with a CVSS score of 7.5, published 5 November 2026.

**Which products and versions are affected?** SignalWire FreeSWITCH prior to 1.11.2.

**Is there a fix for CVE-2026-116782?** Yes: fixed in 1.11.2. Until then: Disable the mod_rtmp module in the FreeSWITCH configuration, or restrict network access to the RTMP listener to trusted clients only. The module is disabled by default in stock builds. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-116782 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-116782?** Check whether you run SignalWire FreeSWITCH at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 1.11.2

Disable the mod_rtmp module in the FreeSWITCH configuration, or restrict network access to the RTMP listener to trusted clients only. The module is disabled by default in stock builds.

## Technical details

The rtmp_i_connect() function in mod_rtmp fails to validate the type of the first RTMP connect argument before passing it to amf0_object_get(), which interprets union bytes as node pointers and dereferences them. An attacker with network access to an enabled RTMP listener can send a string or number instead of an AMF object, triggering an invalid read that crashes FreeSWITCH and terminates all calls. The vulnerability requires network access but no authentication; code execution and memory disclosure have not been demonstrated.

## Affected products

- SignalWire FreeSWITCH prior to 1.11.2

## Timeline

- 2026-11-05: disclosed

## References

- [https://github.com/signalwire/freeswitch/commit/150295ecff43b5ffecf43f250eef3c4fba37b6d5](https://github.com/signalwire/freeswitch/commit/150295ecff43b5ffecf43f250eef3c4fba37b6d5)
- [https://github.com/signalwire/freeswitch/releases/tag/v1.11.2](https://github.com/signalwire/freeswitch/releases/tag/v1.11.2)

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