CVE-2026-33067

SiYuan is a personal knowledge management system. Versions 3.6.0 and below render package metadata fields (displayName, description) using template literals without HTML escaping. A malicious package author can inject arbitrary HTML/JavaScript into these fields, which executes automatically when any user browses the Bazaar page. Because SiYuan's Electron configuration enables nodeIntegration: true with contextIsolation: false, this XSS escalates directly to full Remote Code Execution on the victim's operating system — with zero user interaction beyond opening the marketplace tab. This issue has been fixed in version 3.6.1.

Affected products

Electron, Siyuan

b3log Siyuan

< 3.6.1

Fix

Available

CVSS 3.1

9.0 CRITICAL

EPSS

0.5% (44th percentile)

Weakness

CWE-79

NVD status

Analyzed

Published

2026-03-20