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CVE-2026-73045— SiYuan before 3.7.4 Brute-Force via authFilePublishAccess

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authFilePublishAccess端点对过度身份验证尝试限制不当，可能导致未经身份验证的攻击者暴力破解笔记本发布密码，从而访问受密码保护的已发布笔记本。

CVSS 7.5 · High EPSS 0.52% · P43

Possible ATT&CK Techniques 1 AI

T1110 · Brute Force

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-2026-73045

Vulnerability Information
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Vulnerability Title
SiYuan before 3.7.4 Brute-Force via authFilePublishAccess
Source: CVE Program / CVE List V5
Vulnerability Description
SiYuan before 3.7.4 contains an improper restriction of excessive authentication attempts vulnerability in the authFilePublishAccess endpoint that allows unauthenticated attackers to brute-force per-notebook publish passwords. Attackers can submit unbounded password guesses without rate limiting or CAPTCHA to gain access to password-protected published notebooks.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
过多认证尝试的限制不恰当
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authFilePublishAccess端点对过度身份验证尝试限制不当，可能导致未经身份验证的攻击者暴力破解笔记本发布密码，从而访问受密码保护的已发布笔记本。
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-2026-73045

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III. Intelligence Information for CVE-2026-73045

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Vendor Advisories for CVE-2026-73045 (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-2026-73041 9.0 CRITICAL SiYuan before v3.7.4 Remote Code Execution via PDF Annotations
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-2026-73054 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-307

V. Comments for CVE-2026-73045

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