What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-09 · updated 2026-07-23
• Weakness: CWE-116

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a vulnerable function, PREFIX(prologTok)(), in libs/xmlrpc-c/lib/expat/xmltok/xmltok_impl.c, which was cloned from an outdated and vulnerable version in libexpat/libexpat.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

• signalwire freeswitch: before 1.11.0 — fixed in 1.11.0

How to fix

Upgrade to a fixed version: signalwire freeswitch 1.11.0. Check the vendor advisory for mitigations.

References

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

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