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CVE-2026-54759— SiYuan: Lute HTML sanitizer allows `<iframe>` tags in Bazaar package README, leading to arbitrary command execution via SiYuan Electron client

Quick assessment

Affected
siyuan-note siyuan
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

SiYuan是SiYuan团队的一款文档管理与企业应用软件。 SiYuan 3.7.0之前版本存在跨站脚本漏洞，该漏洞源于Lute的HTML清理器未移除iframe元素，结合SiYuan Electron客户端宽松的安全配置，可能导致攻击者在Bazaar包README中包含恶意iframe，当查看包详情时在受害者机器上执行任意命令。

AI Predicted 9.1 Difficulty: Easy EPSS 0.44% · P37

Affected Version Matrix 1

VendorProduct Version RangeStatus
siyuan-note siyuan < 3.7.0 affected
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I. Basic Information for CVE-2026-54759

Vulnerability Information
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Vulnerability Title
SiYuan: Lute HTML sanitizer allows `<iframe>` tags in Bazaar package README, leading to arbitrary command execution via SiYuan Electron client
Source: CVE Program / CVE List V5
Vulnerability Description
SiYuan is an open-source personal knowledge management system. Prior to 3.7.0, Lute's HTML sanitizer does not remove <iframe> elements. Combined with the SiYuan Electron client's permissive security configuration, an attacker can include a malicious <iframe> in a Bazaar package README that executes arbitrary commands on the victim's machine when the package details are viewed. No package installation is required. This vulnerability is fixed in 3.7.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
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: CVE Program / CVE List V5
Vulnerability Title
siyuan-note siyuan 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
SiYuan是SiYuan团队的一款文档管理与企业应用软件。 SiYuan 3.7.0之前版本存在跨站脚本漏洞，该漏洞源于Lute的HTML清理器未移除iframe元素，结合SiYuan Electron客户端宽松的安全配置，可能导致攻击者在Bazaar包README中包含恶意iframe，当查看包详情时在受害者机器上执行任意命令。
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

Vendor Product Affected Versions CPE Subscribe
siyuan-note siyuan < 3.7.0 -

II. Public POCs for CVE-2026-54759

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III. Intelligence Information for CVE-2026-54759

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Vendor Advisories for CVE-2026-54759 (1)

Same Patch Batch · siyuan-note · 2026-06-24 · 9 CVEs total

CVE-2026-54158 9.9 CRITICAL SiYuan: Stored XSS to RCE via attribute-view cell rendering in genAVValueHTML()
CVE-2026-54067 9.9 CRITICAL SiYuan: Stored XSS to RCE via CSS-snippet <style> breakout in renderSnippet()
CVE-2026-50551 9.9 CRITICAL SiYuan: Stored XSS to RCE via Unsanitized Attribute View Asset Cell Content
CVE-2026-55570 9.0 CRITICAL SiYuan: Stored XSS results to Electron RCE in SiYuan marketplace via unescaped `data-obj`
CVE-2026-54066 7.5 HIGH SiYuan: Path Traversal via Double URL Encoding in /assets/*path (publish mode arbitrary fi
CVE-2026-54070 7.1 HIGH SiYuan: Stored XSS in Bazaar marketplace via package README event handlers
CVE-2026-54068 5.9 MEDIUM SiYuan: Unauthenticated SQLite Data Exfiltration via Template Injection in /api/icon/getDy
CVE-2026-54069 SiYuan: Unauthenticated Admin API Access via Blanket chrome-extension:// Origin Allowlist

IV. Related Vulnerabilities

Same product: siyuan
Same vendor: siyuan-note
Same weakness: CWE-79

V. Comments for CVE-2026-54759

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