CVE-2026-44670: SiYuan: Stored XSS via Attribute View name to Electron renderer RCE in SiYuan

Critical severity · published May 14, 2026

CVE-2026-44670

SiYuan: Stored XSS via Attribute View name to Electron renderer RCE in SiYuan

9.4

CVSS

0.5%

EPSS

On KEV

Description

SiYuan is an open-source personal knowledge management system. Prior to 3.7.0, the kernel stores Attribute View (AV / database) names without any HTML escape, then a render template uses raw strings.ReplaceAll(tpl, "${avName}", nodeAvName) to embed the name in HTML before pushing to all clients via WebSocket. Three independent client paths (render.ts:120 → outerHTML, Title.ts:401 → innerHTML, transaction.ts:559 → innerHTML) consume the value without escaping. Because the main BrowserWindow runs nodeIntegration:true, contextIsolation:false, webSecurity:false (app/electron/main.js:407-411), HTML injection in the renderer becomes Node.js code execution. This vulnerability is fixed in 3.7.0.

Exploitation

Is it being used?

Exploit prediction (EPSS)0.5% · higher than 43% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

siyuan · siyuan-note

< 3.7.0 · source: vendor

Affected product

siyuan