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a vulnerable function, PREFIX(prologTok)(), in libs/xmlrpc-c/lib/expat/xmltok/xmltok_impl.c, which was cloned from an outdated and vulnerable version in libexpat/libexpat.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function, PREFIX(prologTok)(), in libs/xmlrpc-c/lib/expat/xmltok/xmltok_impl.c. This function was cloned from an outdated and vulnerable version in libexpat/libexpat and did not receive the corresponding security patch.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

Sources and references

Verified primary and authoritative sources

  • CVE-2026-49472 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-49472

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-49472 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-49472

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.