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.

CVSS Vector

References

• https://github.com/siyuan-note/siyuan/security/advisories/GHSA-6gx2-8gcr-x83f
• https://www.vulncheck.com/advisories/siyuan-desktop-before-reflected-xss-to-rce-via-siyuan-protocol
• https://github.com/siyuan-note/siyuan/security/advisories/GHSA-6gx2-8gcr-x83f