CVE-2026-33066
Description
SiYuan is a personal knowledge management system. In versions 3.6.0 and below, the backend renderREADME function uses lute.New() without calling SetSanitize(true), allowing raw HTML embedded in Markdown to pass through unmodified. The frontend then assigns the rendered HTML to innerHTML without any additional sanitization. A malicious package author can embed arbitrary JavaScript in their README that executes when a user clicks to view the package details. Because SiYuan's Electron configuration enables nodeIntegration: true with contextIsolation: false, this XSS escalates directly to full Remote Code Execution. The issue was patched in version 3.6.1.
How to fix
- b3log siyuan3.6.1 or later
- github.com/siyuan-note/siyuan/kernel0.0.0-20260314111550-b382f50e1880 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| b3log siyuan | v < 3.6.1 | 3.6.1 |
| github.com/siyuan-note/siyuan/kernelGo | v < 0.0.0-20260314111550-b382f50e1880 | 0.0.0-20260314111550-b382f50e1880 |
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Attack Surface Management
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