CVE-2026-56397

SiYuan - Remote Code Execution via Malicious Bazaar Package Metadata and README

CVSS 9.4 CRITICALEPSS 0.4%CWE-79

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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Affected products

SiYuan · SiYuan

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References

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-v3mg-9v85-fcm7 https://www.vulncheck.com/advisories/siyuan-remote-code-execution-via-malicious-bazaar-package-metadata-and-readme-2