What is CVE-2026-49472?

CVE-2026-49472 is a medium-severity vulnerability in Freeswitch, classified under Improper Encoding or Escaping of Output. CVSS score: 5.3/10. Published 2026-06-09.

How severe is CVE-2026-49472?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Freeswitch

CVE-2026-49472

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a vulnerable function, PREFIX(prologTok)(), in libs/xmlrpc-c/lib/expat/xmltok/xmltok_impl.c, which was cloned from an outdated and vulnerable version in libexpat/libexpat.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

Published 2026-06-09 · last modified 2026-07-23.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.004 (28.6th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 29th percentile — 28.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.004 · change: +0.001

Affected products

Freeswitch
Signalwire Freeswitch — versions < 1.11.0

Weakness classification (CWE)

CWE-116 — Improper Encoding or Escaping of Output

References

github.com/signalwire/freeswitch/releases/tag/v1.11.0 (Release Notes)
github.com/signalwire/freeswitch/security/advisories/GHSA-4jm3-xpcm-mwwq (Third Party Advisory)

Frequently asked questions

What is CVE-2026-49472?: CVE-2026-49472 is a medium-severity vulnerability in Freeswitch, classified under Improper Encoding or Escaping of Output. CVSS score: 5.3/10. Published 2026-06-09.
How severe is CVE-2026-49472?: Medium severity. CVSS v3 base score is 5.3 out of 10.