CVE-2026-66395
CRITICAL
NVD
CVSS Score
9.6
Severity
CRITICAL
Published
Jul 27, 2026
Vendor
unknown
Description
SiYuan desktop before v3.7.2 contains a reflected cross-site scripting vulnerability in the bazaar plugin readme handler that allows attackers to execute arbitrary code by crafting a malicious siyuan:// deep link. Attackers can inject HTML payloads via the plugin name parameter that execute with full Node.js access through insertAdjacentHTML rendering in an insecurely configured Electron renderer.