VULNERABILITY INTELLIGENCE
CVE-2026-56397
CVSS score9.6 CRITICAL
EPSS probability0.50%
CISA KEVNot currently listed
Published2026-06-21
Last modified2026-10-08
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
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.
Weakness classification
- disclosure@vulncheck.com: CWE-79