CVE-2026-56395

CRITICAL SEVERITY

CVSS Score & Metrics

Base Score

9.6 / 10

Vector String

                                        CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H                                    

Vulnerability 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.

Vulnerability Details

Published Date

June 21, 2026

Last Modified

June 21, 2026

CWE ID

CWE-79

Source

NVD

Vendor

SiYuan

Product

SiYuan

External 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

CVE-2026-56395

CVSS Score & Metrics

Vulnerability Description

Vulnerability Details

External References

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