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CVE-2026-73041— SiYuan before v3.7.4 Remote Code Execution via PDF Annotations

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团队开源的一款文档管理软件。 SiYuan 3.7.4之前版本存在跨站脚本漏洞，该漏洞源于setFileAnnotation端点未对写入磁盘的注释字段进行验证或转义，攻击者可注入恶意标记，在用户打开带注释的PDF时以脚本形式在PDF渲染器中执行，并具有完整的Node.js访问权限。

CVSS 9.0 · Critical EPSS 0.23% · P15

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 2

VendorProduct Version RangeStatus
siyuan-note siyuan < 3.7.4 affected
3.7.4 unaffected
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I. Basic Information for CVE-2026-73041

Vulnerability Information
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Vulnerability Title
SiYuan before v3.7.4 Remote Code Execution via PDF Annotations
Source: CVE Program / CVE List V5
Vulnerability Description
SiYuan versions before v3.7.4 fail to validate or escape annotation fields written to disk by the setFileAnnotation endpoint. Attackers can inject malicious markup into annotation fields that execute as script in the PDF renderer with full Node.js access when a user opens an annotated PDF.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/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团队开源的一款文档管理软件。 SiYuan 3.7.4之前版本存在跨站脚本漏洞，该漏洞源于setFileAnnotation端点未对写入磁盘的注释字段进行验证或转义，攻击者可注入恶意标记，在用户打开带注释的PDF时以脚本形式在PDF渲染器中执行，并具有完整的Node.js访问权限。
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 ~ 3.7.4 -

II. Public POCs for CVE-2026-73041

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III. Intelligence Information for CVE-2026-73041

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Vendor Advisories for CVE-2026-73041 (2)

Same Patch Batch · siyuan-note · 2026-08-15 · 11 CVEs total

CVE-2026-73046 9.8 CRITICAL SiYuan before v3.7.4 Authentication Bypass via HTTP Basic Auth
CVE-2026-73050 9.0 CRITICAL SiYuan before v3.7.4 Stored XSS via select option color
CVE-2026-73043 9.0 CRITICAL SiYuan before v3.7.4 Remote Code Execution via Template Calculation
CVE-2026-73042 9.0 CRITICAL SiYuan before v3.7.4 Remote Code Execution via Menu Metadata
CVE-2026-73044 9.0 CRITICAL SiYuan before v3.7.4 Stored Cross-Site Scripting via Column Width
CVE-2026-73053 9.0 CRITICAL SiYuan before v3.7.4 Cross-Site Scripting via unicode2Emoji
CVE-2026-73052 9.0 CRITICAL SiYuan before v3.7.4 Stored XSS via Attribute-View Field Names
CVE-2026-73045 7.5 HIGH SiYuan before 3.7.4 Brute-Force via authFilePublishAccess
CVE-2026-73054 7.5 HIGH SiYuan before v3.7.4 Authentication Bypass via WebSocket
CVE-2026-73047 6.2 MEDIUM siyuan before v3.7.4 Server-Side Template Injection via attribute-view

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-73041

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