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

CVSS 9.6 · Critical EPSS 0.39% · P31

Affected Version Matrix 2

VendorProductVersion RangeStatus
SiYuanSiYuan< 3.6.1affected
3.6.1unaffected
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I. Basic Information for CVE-2026-56397

Vulnerability Information
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Vulnerability Title
SiYuan - Remote Code Execution via Malicious Bazaar Package Metadata and README
Source: NVD (National Vulnerability Database)
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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: NVD (National Vulnerability Database)
Vulnerability Title
SiYuan 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
SiYuan是SiYuan团队开源的一个个人知识管理系统。 SiYuan 3.6.1之前版本存在跨站脚本漏洞，该漏洞源于未对Bazaar市场中的包metadata和README内容进行清理，可能导致恶意包作者注入任意HTML和JavaScript。攻击者可通过在包displayName、description或README字段中嵌入XSS有效载荷，利用Electron的nodeIntegration设置执行OS命令，实现远程代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
SiYuanSiYuan 0 ~ 3.6.1 -

II. Public POCs for CVE-2026-56397

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III. Intelligence Information for CVE-2026-56397

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Vendor Advisories for CVE-2026-56397 (2)

IV. Related Vulnerabilities

Same product: SiYuan
Same vendor: SiYuan
Same weakness: CWE-79

V. Comments for CVE-2026-56397

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