CVE-2026-73053 [CRITICAL] – SiYuan versions before v3.7.4 contain a cross-site scripting vulnerability in the unicode2

SiYuan versions before v3.7.4 contain a cross-site scripting vulnerability in the unicode2Emoji function that fails to sanitize codepoint branch output. Attackers can craft document icons with hex-encoded markup that executes in the renderer with Node integration enabled, achieving arbitrary code execution on the host system.