Unrated severityNVD Advisory· Published Jul 27, 2026· Updated Jul 28, 2026
SiYuan Desktop before v3.7.2 Reflected XSS to RCE via siyuan Protocol
CVE-2026-66395
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.
Affected products
1- Range: <3.7.2
Patches
Vulnerability mechanics
References
2- github.com/siyuan-note/siyuan/security/advisories/GHSA-6gx2-8gcr-x83fmitrevendor-advisory
- www.vulncheck.com/advisories/siyuan-desktop-before-reflected-xss-to-rce-via-siyuan-protocolmitrethird-party-advisory
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