Quick answers
- Is CVE-2026-116574 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-116574 being exploited in the wild.
- How severe is CVE-2026-116574?
- Medium severity, with a CVSS score of 5.9, published 5 November 2026.
- Which products and versions are affected?
- SignalWire FreeSWITCH before 1.11.2.
- Is there a fix for CVE-2026-116574?
- 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-2026-116574 attacked?
- It is attacked over the network, in a hosted service.
- Am I affected by CVE-2026-116574?
- 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
The switch_xml_ampencode() function reserved only 10 bytes for the numeric character reference produced from a four-byte UTF-8 sequence, omitting space for the terminating NUL written by sprintf(). When remote-supplied text is serialized at the buffer-growth boundary, this NUL byte writes one byte beyond the heap allocation. The vulnerability is reachable through mod_xml_cdr, conference records, and XML API outputs that serialize caller-controlled values; remote code execution has not been demonstrated, but the overwrite can abort the process or truncate adjacent heap objects.
Affected products
- SignalWire FreeSWITCH before 1.11.2
Timeline
- 2026-11-05: disclosed