CVE-2026-45771

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's bundled XML parser expands nested <!ENTITY> declarations without a depth or count bound, so a small DTD can describe a body that expands exponentially ("billion laughs"). The PIDF body of a SIP PUBLISH is fed to this parser before any digest check, letting an unauthenticated network attacker force unbounded CPU and memory consumption with a single request. This issue has been patched in version 1.11.0.

CVSS Vector

Affected Products

References

• https://github.com/signalwire/freeswitch/releases/tag/v1.11.0
• https://github.com/signalwire/freeswitch/security/advisories/GHSA-5vjg-pv56-vg4c