FreeSWITCH: Pre-authentication heap buffer overflow in core XML empty-entity decoding

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-116788
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-11-05 20:17:46 UTC
Updated2026-11-09 18:17:22 UTC
DescriptionFreeSWITCH is an open-source software telecommunications platform. Before version 1.11.2, an integer underflow in  switch_xml_decode()  can cause an undersized heap allocation when an XML document declares an entity with an empty replacement value. Subsequent copying overruns the allocated buffer. An unauthenticated attacker who can reach a SIP profile with presence management enabled and DTD processing permitted can trigger the vulnerability through a crafted SIP PUBLISH request. Exploitation can corrupt heap memory and terminate the FreeSWITCH process, interrupting all active calls. This vulnerability is fixed in version 1.11.2.

Risk And Classification

Primary CVSS: v3.1 8.2 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

EPSS: 0.004090000 probability, percentile 0.354550000 (date 2026-11-09)

Problem Types: CWE-122 | CWE-131 | CWE-191 | CWE-122 CWE-122: Heap-based Buffer Overflow | CWE-131 CWE-131: Incorrect Calculation of Buffer Size | CWE-191 CWE-191: Integer Underflow (Wrap or Wraparound)

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary8.2HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
3.1CNADECLARED8.2HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Signalwire Freeswitch affected < 1.11.2 Not specified

References

ReferenceSourceLinkTags
github.com/signalwire/freeswitch/commit/587474a1584488f0c04201e6e61efe76... [email protected] github.com
github.com/signalwire/freeswitch/releases/tag/v1.11.2 [email protected] github.com
github.com/signalwire/freeswitch/security/advisories/GHSA-f73w-xph4-pjp3 [email protected] github.com
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