CVE-2026-56397
CRITICAL
NVD
CVSS Score
9.6
Severity
CRITICAL
Published
Jun 21, 2026
Vendor
unknown
Description
SiYuan before v3.6.1 fails to sanitize package metadata and README content in the Bazaar marketplace, allowing malicious package authors to inject arbitrary HTML and JavaScript. Attackers can achieve remote code execution on any user browsing the Bazaar by embedding XSS payloads in package displayName, description, or README fields, exploiting Electron's nodeIntegration setting to execute OS commands.