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CVE-2026-65606— SiYuan before v3.7.2 Cross-Site Scripting to RCE

Quick assessment

Affected
siyuan-note siyuan
Exploitation
Public or AI PoC available; prioritize validation
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团队开源的一个个人知识管理系统。 SiYuan 3.7.2之前版本存在跨站脚本漏洞，该漏洞源于siyuan://协议处理程序中对icon参数未进行转义直接插入tab标头，导致容易受到跨站脚本攻击，并可能升级为任意操作系统命令执行。

CVSS 9.6 · Critical EPSS 0.79% · P56

Affected Version Matrix 2

VendorProduct Version RangeStatus
siyuan-note siyuan < 3.7.2 affected
3.7.2 unaffected
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I. Basic Information for CVE-2026-65606

Vulnerability Information
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Vulnerability Title
SiYuan before v3.7.2 Cross-Site Scripting to RCE
Source: CVE Program / CVE List V5
Vulnerability Description
SiYuan before v3.7.2 contains a cross-site scripting vulnerability in the siyuan:// protocol handler. When a siyuan://plugins/<name> link references a name that is not an installed plugin, the application opens a custom tab and inserts the link's icon parameter into the tab header via innerHTML without escaping it (app/src/layout/Tab.ts), allowing injection of an <img onerror=...> element. Because the SiYuan Desktop renderer runs with nodeIntegration:true, the injected JavaScript can access Node's require and call require('child_process').execSync(...), escalating the cross-site scripting into arbitrary operating-system command execution.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
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 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 3.7.2之前版本存在跨站脚本漏洞，该漏洞源于siyuan://协议处理程序中对icon参数未进行转义直接插入tab标头，导致容易受到跨站脚本攻击，并可能升级为任意操作系统命令执行。
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

Vendor Product Affected Versions CPE Subscribe
siyuan-note siyuan 0 ~ 3.7.2 -

II. Public POCs for CVE-2026-65606

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 7928 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2026-65606

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Vendor Advisories for CVE-2026-65606 (1)

Other References for CVE-2026-65606 (1)

Same Patch Batch · siyuan-note · 2026-07-23 · 3 CVEs total

CVE-2026-65605 9.6 CRITICAL SiYuan before v3.7.2 Stored XSS to RCE via Attribute View
CVE-2026-65607 6.5 MEDIUM SiYuan before v3.7.2 Path Traversal via /export/temp/

IV. Related Vulnerabilities

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