CVE-2026-44670

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

State: Published
Severity: 9.4 Critical
Published: May 14, 2026
Updated: May 15, 2026
Reserved: May 7, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	9.4 Critical	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H	GitHub_M

Weaknesses

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-94 Improper Control of Generation of Code ('Code Injection')
CWE-1188 Insecure Default Initialization of Resource

Affected Products

Product	Versions
siyuansiyuan-note	< 3.7.0Affected

References

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-2h64-c999-c9r6

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