CVE-2026-56395

CRITICAL

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 v3.1 Score

9.6
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Published: 6/21/2026Modified: 6/22/2026

Related Intelligence (0)

No articles currently reference this CVE.

References (3)

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-v3mg-9v85-fcm7https://www.vulncheck.com/advisories/siyuan-remote-code-execution-via-malicious-bazaar-package-metadata-and-readmehttps://github.com/siyuan-note/siyuan/security/advisories/GHSA-v3mg-9v85-fcm7