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CVE-2026-74906— SiYuan before v3.7.4 Incorrect Authorization via Publish Access

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，该漏洞源于八个发布模式面向读者的端点存在授权错误，使用可见性列表而非禁用列表过滤结果，导致匿名访问者可通过访问搜索、反向链接、资源内容、保存条件、最近文档、图形和标签等端点，发现并读取被明确标记为禁止发布的文档内容。

CVSS 7.5 · High EPSS 0.30% · P22

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage

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-2026-74906

Vulnerability Information
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Vulnerability Title
SiYuan before v3.7.4 Incorrect Authorization via Publish Access
Source: CVE Program / CVE List V5
Vulnerability Description
SiYuan before v3.7.4 contains an incorrect authorization vulnerability in eight publish-mode reader-facing endpoints that filter results using the visibility list instead of the disabled list. Anonymous visitors can discover and read content from documents explicitly marked as forbidden from publishing by accessing search, backlink, asset content, saved criteria, recent documents, graph, and tag endpoints.
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
授权机制不正确
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，该漏洞源于八个发布模式面向读者的端点存在授权错误，使用可见性列表而非禁用列表过滤结果，导致匿名访问者可通过访问搜索、反向链接、资源内容、保存条件、最近文档、图形和标签等端点，发现并读取被明确标记为禁止发布的文档内容。
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-2026-74906

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III. Intelligence Information for CVE-2026-74906

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Vendor Advisories for CVE-2026-74906 (2)

Same Patch Batch · siyuan-note · 2026-08-18 · 5 CVEs total

CVE-2026-74902 8.6 HIGH SiYuan before v3.7.4 XSS-to-RCE via malicious filename upload
CVE-2026-74904 7.5 HIGH SiYuan before v3.7.4 Missing Authorization via block API
CVE-2026-74905 7.1 HIGH SiYuan before v3.7.4 SSRF via IPv6 Transition Address Bypass
CVE-2026-74903 4.3 MEDIUM SiYuan before v3.7.4 Insufficient Access Control via spinBlockDOM

IV. Related Vulnerabilities

Same product: siyuan
Same vendor: siyuan-note
Same weakness: CWE-863

V. Comments for CVE-2026-74906

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