CVE-2026-66394 | BDVDB-2026-353095 Detail

Description#

SiYuan before v3.7.3 contains stored and reflected cross-site scripting vulnerabilities in SVG sanitization that allows authenticated attackers to execute scripts by bypassing the HTML parser-based cleaner. Attackers can hide script tags within desc, style, or noscript elements which the HTML parser treats as raw text but browsers interpret as executable SVG content when served as image/svg+xml, enabling script execution in the application origin.

Impact#

Weaknesses#

References#

Exploit#

History#

1. Version 12026-07-27Record published in the CVE List.
2. Version 22026-10-08Most recent update recorded in the CVE List.