CVE-2026-49472

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

MEDIUM
5.3
CVSS Score
Published: June 9, 2026 at 03:59 PM UTC
Updated: July 23, 2026 at 07:32 PM UTC
2 products affected across 2 vendorsFreeswitchFreeswitch

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Severity
MEDIUM5.3
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

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a vulnerable function, PREFIX(prologTok)(), in libs/xmlrpc-c/lib/expat/xmltok/xmltok_impl.c, which was cloned from an outdated and vulnerable version in libexpat/libexpat.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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 1.11.0
Affected range stops below 1.11.0, so it looks safe — our inference, not a vendor statement
v < 1.11.0
Affected range stops below 1.11.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (2)

x_refsource_CONFIRMThird Party Advisory
Source: cverecord
https://github.com/signalwire/freeswitch/security/advisories/GHSA-4jm3-xpcm-mwwq
x_refsource_MISCRelease Notes
Source: cverecord
https://github.com/signalwire/freeswitch/releases/tag/v1.11.0

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUMGitHub_M
Attack Vector
NETWORK
Complexity
HIGH
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-116

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