Is CVE-2026-116788 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-116788 being exploited in the wild.

How severe is CVE-2026-116788?

High severity, with a CVSS score of 8.2, published 5 November 2026.

Which products and versions are affected?

SignalWire FreeSWITCH before 1.11.2.

Is there a fix for CVE-2026-116788?

Yes: fixed in 1.11.2. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-116788 attacked?

It is attacked over the network, in a hosted service.

Am I affected by CVE-2026-116788?

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.

CVE-2026-116788: FreeSWITCH integer underflow in XML decode

CVE-2026-116788 · Severity: high · CVSS 8.2 · Published 2026-11-05

FreeSWITCH is an open-source telecommunications platform that handles VoIP calls and media. An integer underflow in XML parsing can cause a crash that terminates the process and interrupts all active calls when processing specially crafted SIP requests with XML entities. An attacker without authentication can trigger this by sending a malicious SIP PUBLISH message to a presence-enabled profile.

Technologies: SignalWire FreeSWITCH. Vendors: SignalWire.

Quick answers

Is CVE-2026-116788 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-116788 being exploited in the wild.
How severe is CVE-2026-116788?: High severity, with a CVSS score of 8.2, published 5 November 2026.
Which products and versions are affected?: SignalWire FreeSWITCH before 1.11.2.
Is there a fix for CVE-2026-116788?: Yes: fixed in 1.11.2. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-116788 attacked?: It is attacked over the network, in a hosted service.
Am I affected by CVE-2026-116788?: 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

Technical details

An integer underflow in the switch_xml_decode() function occurs when an XML entity is declared with an empty replacement value, leading to undersized heap allocation. When subsequent data is copied into this buffer, a heap overflow results. The vulnerability requires network reachability to a SIP profile with presence management enabled and DTD processing permitted; exploitation corrupts heap memory and crashes the process.

Affected products

SignalWire FreeSWITCH before 1.11.2

Timeline

2026-11-05: disclosed

References

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