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.
How to fix
- freeswitch freeswitch1.11.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| freeswitch freeswitch | v < 1.11.0 | 1.11.0 |
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