CVE-2026-49472CWE-116

FreeSWITCH includes a vulnerable function, PREFIX(prologTok)() from libexpat

Medium · published June 9, 2026

CVSS v3.1
5.3
EPSS
0%
Percentile
30.0
In the wild
Unconfirmed
What it is

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a vulnerable function, PREFIX(prologTok)(), in libs/xmlrpc-c/lib/expat/xmltok/xmltok_impl.c, which was cloned from an outdated and vulnerable version in libexpat/libexpat.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

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00372 · 30.0th percentile
Weakness
CWE-116 · Improper Encoding or Escaping of Output
Published
2026-06-09T15:59Z
EPSS history
Timeline
  • 09 JUN 15:59Z
    FreeSWITCH includes a vulnerable function, PREFIX(prologTok)() from libexpat
    cvelistv5