CVE-2026-41421

SiYuan is an open-source personal knowledge management system. Prior to 3.6.5, SiYuan desktop renders notification messages as raw HTML inside an Electron renderer. The notification route POST /api/notification/pushMsg accepts a user-controlled msg value, forwards it through the backend broadcast layer, and the frontend inserts it into the DOM with insertAdjacentHTML(...) at message.ts. On desktop builds, this is not limited to ordinary XSS. Electron windows are created with nodeIntegration: true, contextIsolation: false, and webSecurity: false at main.js. As a result, JavaScript executed from the notification sink can directly access Node APIs and escalate to desktop code execution. This vulnerability is fixed in 3.6.5.

The following products are affected by CVE-2026-41421 vulnerability.

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-41421.

URL	Resource
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-grjj-6f6g-cq8q