Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

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

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。

AI Predicted 5.4 Difficulty: Easy EPSS 0.55% · P45
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-32815

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
SiYuan: Cross-Origin WebSocket Hijacking via Authentication Bypass — Unauthenticated Information Disclosure
Source: CVE Program / CVE List V5
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: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5
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

Vendor Product Affected Versions CPE Subscribe
siyuan-note siyuan < 3.6.1 -

II. Public POCs for CVE-2026-32815

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-32815

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-32815 (1)

Vendor Advisories for CVE-2026-32815 (1)

Vendor Pages for CVE-2026-32815 (1)

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

CVE-2026-32749 7.6 HIGH SiYuan importSY/importZipMd: Path Traversal via multipart filename enables arbitrary file
CVE-2026-32747 6.8 MEDIUM SiYuan: Incomplete sensitive path blocklist in globalCopyFiles allows reading /proc and Do
CVE-2026-32750 6.8 MEDIUM SiYuan importStdMd: unvalidated localPath imports arbitrary host directories as persistent
CVE-2026-32751 SiYuan 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

No comments yet

Leave a comment