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CVE-2026-32815— SiYuan: Cross-Origin WebSocket Hijacking via Authentication Bypass — Unauthenticated Information Disclosure

EPSS 0.06% · P19
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I. Basic Information for CVE-2026-32815

Vulnerability Information
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Vulnerability Title
SiYuan: Cross-Origin WebSocket Hijacking via Authentication Bypass — Unauthenticated Information Disclosure
Source: NVD (National Vulnerability Database)
Vulnerability Description
SiYuan is a personal knowledge management system. In versions 3.6.0 and below, the WebSocket endpoint (/ws) allows unauthenticated connections when specific URL parameters are provided (?app=siyuan&id=auth&type=auth). This bypass, intended for the login page to keep the kernel alive, allows any external client — including malicious websites via cross-origin WebSocket — to connect and receive all server push events in real-time. These events leak sensitive document metadata including document titles, notebook names, file paths, and all CRUD operations performed by authenticated users. Combined with the absence of Origin header validation, a malicious website can silently connect to a victim's local SiYuan instance and monitor their note-taking activity. This issue has been fixed in version 3.6.1.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
认证机制不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
SiYuan 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
SiYuan是SiYuan开源的一个隐私至上的个人知识管理系统。 SiYuan 3.6.0及之前版本存在授权问题漏洞，该漏洞源于WebSocket端点允许未经身份验证的连接，可能导致敏感文档元数据泄露。
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
siyuan-notesiyuan < 3.6.1 -

II. Public POCs for CVE-2026-32815

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III. Intelligence Information for CVE-2026-32815

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Same Patch Batch · siyuan-note · 2026-03-19 · 5 CVEs total

CVE-2026-327497.6 HIGHSiYuan importSY/importZipMd: Path Traversal via multipart filename enables arbitrary file
CVE-2026-327476.8 MEDIUMSiYuan: Incomplete sensitive path blocklist in globalCopyFiles allows reading /proc and Do
CVE-2026-327506.8 MEDIUMSiYuan importStdMd: unvalidated localPath imports arbitrary host directories as persistent
CVE-2026-32751SiYuan Vulnerable to Remote Code Execution via Stored XSS in Notebook Name - Mobile Interf

IV. Related Vulnerabilities

Same product: siyuan
Same vendor: siyuan-note
Same weakness: CWE-287

V. Comments for CVE-2026-32815

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