CVE-2026-116574 FreeSWITCH: Off-by-one heap write in core XML serialization of four-byte UTF-8 sequences

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 1.11.2, switchxmlampencode reserved only ten bytes for the widest numeric character reference produced fr...