Vulnerability · Published Jun 9, 2026 · Assigned by GitHub_M

CVE-2026-49472FreeSWITCH includes a vulnerable function, PREFIX(prologTok)() from libexpat

Medium 5.3

In plain English

A medium-severity security flaw in freeswitch from signalwire. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 13% of all known vulnerabilities).

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)0.2%top 87.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

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 version 1.11.0, FreeSWITCH includes a vulnerable function, PREFIX(prologTok)(), in libs/xmlrpc-c/lib/expat/xmltok/xmltok_impl.c, which was cloned from an outdated and vulnerable version in libexpat/libexpat. The function did not receive the corresponding security patch. This issue has been patched in version 1.11.0.

Affected products (as reported)

Vendor	Product	Versions
signalwire	freeswitch	< 1.11.0

Weakness: CWE-116 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

References

https://github.com/signalwire/freeswitch/security/advisories/GHSA-4jm3-xpcm-mwwq x_refsource_CONFIRM
https://github.com/signalwire/freeswitch/releases/tag/v1.11.0 x_refsource_MISC