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PatchSiren cyber security CVE debrief

CVE-2026-49472 signalwire CVE debrief

CVE-2026-49472 is a vulnerability in FreeSWITCH, a Software Defined Telecom Stack. The vulnerability is caused by a vulnerable function, PREFIX(prologTok)(), in libs/xmlrpc-c/lib/expat/xmltok/xmltok_impl.c, which was cloned from an outdated and vulnerable version in libexpat/libexpat.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. The vulnerability has a CVSS score of 5.3 and a severity of MEDIUM.

Vendor
signalwire
Product
freeswitch
CVSS
MEDIUM 5.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-09
Original CVE updated
2026-06-10
Advisory published
2026-06-09
Advisory updated
2026-06-10

Who should care

Users of FreeSWITCH versions prior to 1.11.0 should be aware of this vulnerability and take steps to upgrade to the latest version.

Technical summary

The vulnerability is caused by a vulnerable function, PREFIX(prologTok)(), in libs/xmlrpc-c/lib/expat/xmltok/xmltok_impl.c. This function was cloned from an outdated and vulnerable version in libexpat/libexpat and did not receive the corresponding security patch.

Defensive priority

MEDIUM

Recommended defensive actions

  • Upgrade to FreeSWITCH version 1.11.0 or later.

Evidence notes

The vulnerability was patched in version 1.11.0.

Official resources

CVE-2026-49472 was published on 2026-06-09T17:17:47.243Z and modified on 2026-06-10T15:06:00.993Z.