CVE-2026-39846

Published Apr 7, 2026

Last updated 16 days ago

Overview

Description
SiYuan is a personal knowledge management system. Prior to 3.6.4, a malicious note synced to another user can trigger remote code execution in the SiYuan Electron desktop client. The root cause is that table caption content is stored without safe escaping and later unescaped into rendered HTML, creating a stored XSS sink. Because the desktop renderer runs with nodeIntegration enabled and contextIsolation disabled, attacker-controlled JavaScript executes with access to Node.js APIs. In practice, an attacker can import a crafted note into a synced workspace, wait for the victim to sync, and achieve code execution when the victim opens the note. This vulnerability is fixed in 3.6.4.
Source
security-advisories@github.com
NVD status
Analyzed
Products
siyuan

Risk scores

CVSS 3.1

Type
Primary
Base score
9
Impact score
6
Exploitability score
2.3
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
Severity
CRITICAL

Weaknesses

security-advisories@github.com
CWE-79
nvd@nist.gov
CWE-79

Social media

Hype score
Not currently trending

Configurations