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CVE-2026-72810— SiYuan before v3.7.4 Publish-Boundary Bypass via WebSocket

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之前版本存在授权问题漏洞，该漏洞源于WebSocket广播会话存在发布边界绕过，可能导致未经身份验证的攻击者建立WebSocket连接，被动接收包括受密码保护和禁止文档在内的实时内容事件。

CVSS 8.6 · High EPSS 0.54% · P44

Possible ATT&CK Techniques 1 AI

T1114 · Email Collection

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-2026-72810

Vulnerability Information
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Vulnerability Title
SiYuan before v3.7.4 Publish-Boundary Bypass via WebSocket
Source: CVE Program / CVE List V5
Vulnerability Description
SiYuan versions before v3.7.4 contain a publish-boundary bypass vulnerability in WebSocket broadcast sessions that allows anonymous readers to receive unfiltered edits. Attackers can establish a WebSocket connection to the publish surface and passively receive real-time content events including password-protected and forbidden documents without authentication.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
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团队开源的一款文档管理软件。 SiYuan 3.7.4之前版本存在授权问题漏洞，该漏洞源于WebSocket广播会话存在发布边界绕过，可能导致未经身份验证的攻击者建立WebSocket连接，被动接收包括受密码保护和禁止文档在内的实时内容事件。
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-2026-72810

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-72810

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Vendor Advisories for CVE-2026-72810 (1)

Other References for CVE-2026-72810 (1)

Same Patch Batch · siyuan-note · 2026-08-14 · 6 CVEs total

CVE-2026-72811 10.0 CRITICAL SiYuan before v3.7.4 SQL Injection via backlink search
CVE-2026-72812 6.5 MEDIUM SiYuan before v3.7.4 Missing Authorization via refreshBacklink
CVE-2026-73630 5.8 MEDIUM SiYuan before v3.7.4 Information Disclosure via authFilePublishAccess
CVE-2026-73049 5.8 MEDIUM SiYuan before v3.7.4 Information Disclosure via getAttributeViewBacklinks
CVE-2026-73048 5.8 MEDIUM SiYuan before v3.7.4 Information Disclosure via getRefIDsByFileAnnotationID

IV. Related Vulnerabilities

Same product: siyuan
Same vendor: siyuan-note
Same weakness: CWE-862

V. Comments for CVE-2026-72810

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