CVE-2026-45771
Freeswitch Denial-of-Service in SIP PUBLISH Requests via XML Entity Expansion
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.
| CWE | CWE-776 |
| Vendor | signalwire |
| Product | freeswitch |
| Published | Jun 9, 2026 |
| Last Updated | Jun 9, 2026 |
Get instant alerts for signalwire freeswitch
Be the first to know when new high vulnerabilities affecting signalwire freeswitch are published — delivered to Slack, Telegram or Discord.
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H