CVEvulnerability

CVE-2026-41421

8.8 HIGH Published 2026-04-24 Modified 2026-06-17 Official page ↗
Status
Deferred
Published
2026-04-24
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
8.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Weaknesses
CWE-78, CWE-79

Description

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.

Related

Weakness · CWE (2)

  • CWE-78 Improper Neutralization of Special Elements used in an OS Command weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation weakness

References