What is CVE-2026-116788?

CVE-2026-116788 is a high-severity vulnerability in Signalwire Freeswitch, classified under Heap-based Buffer Overflow. CVSS score: 8.2/10. Published 2026-11-05.

How severe is CVE-2026-116788?

High severity. CVSS v3 base score is 8.2 out of 10.

Buffer overflow in Signalwire Freeswitch

CVE-2026-116788

FreeSWITCH is an open-source software telecommunications platform. Before version 1.11.2, an integer underflow in switch_xml_decode() can cause an undersized heap allocation when an XML document declares an entity with an empty replacement value. Subsequent copying overruns the allocated buffer. An unauthenticated attacker who can reach a SIP profile with presence management enabled and DTD processing permitted can trigger the vulnerability through a crafted SIP PUBLISH request. Exploitation can corrupt heap memory and terminate the FreeSWITCH process, interrupting all active calls. This vulnerability is fixed in version 1.11.2.

Vulnerability class: Buffer Overflow

Published 2026-11-05 · last modified 2026-11-05.

CVSS v3 metric

CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Signalwire Freeswitch — versions < 1.11.2

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-116788?: CVE-2026-116788 is a high-severity vulnerability in Signalwire Freeswitch, classified under Heap-based Buffer Overflow. CVSS score: 8.2/10. Published 2026-11-05.
How severe is CVE-2026-116788?: High severity. CVSS v3 base score is 8.2 out of 10.