Is CVE-2026-73053 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-73053?

CVE-2026-73053 has a CVSS v3 severity of CRITICAL (9).

Back

CVE-2026-73053

Description

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.