CVE-2026-56397 – SiYuan – Remote Code Execution via Malicious Bazaar Package Metadata and README

CVE ID :CVE-2026-56397

Published : June 21, 2026, 1:27 p.m. | 2 hours, 16 minutes ago

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.

Severity: 9.6 | CRITICAL

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