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CVE-2026-72803— SiYuan before v3.7.4 Information Disclosure via getBlockAttrs

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getBlockAttrs和batchGetBlockAttrs端点未强制实施发布访问检查，可能导致攻击者通过发送带有块ID的POST请求，检索受保护文档中的块属性，包括名称、别名、备注和自定义字段。

CVSS 5.8 · Medium EPSS 0.33% · P23

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-2026-72803

Vulnerability Information
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Vulnerability Title
SiYuan before v3.7.4 Information Disclosure via getBlockAttrs
Source: CVE Program / CVE List V5
Vulnerability Description
SiYuan versions before v3.7.4 fail to enforce publish-access checks in the getBlockAttrs and batchGetBlockAttrs endpoints. Attackers can retrieve block attributes including names, aliases, memos, and custom fields from protected documents by sending POST requests with block IDs.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/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getBlockAttrs和batchGetBlockAttrs端点未强制实施发布访问检查，可能导致攻击者通过发送带有块ID的POST请求，检索受保护文档中的块属性，包括名称、别名、备注和自定义字段。
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-2026-72803

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III. Intelligence Information for CVE-2026-72803

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Vendor Advisories for CVE-2026-72803 (2)

Same Patch Batch · siyuan-note · 2026-08-12 · 22 CVEs total

CVE-2026-72794 8.6 HIGH siyuan before v3.7.4 Session Cookie Key Disclosure via getConf
CVE-2026-72793 8.6 HIGH SiYuan before v3.7.4 Information Disclosure via /api/system/getConf
CVE-2026-72804 8.6 HIGH SiYuan before v3.7.4 Authentication Bypass via Graph Endpoints
CVE-2026-72789 8.6 HIGH SiYuan before v3.7.4 Authentication Bypass via Encrypted Notebooks
CVE-2026-72798 8.6 HIGH SiYuan before v3.7.4 Information Disclosure via renderAttributeView
CVE-2026-72795 8.6 HIGH SiYuan before v3.7.4 Information Disclosure via Embed Block
CVE-2026-72809 8.0 HIGH SiYuan before v3.7.4 Authentication Bypass via Localhost Trust
CVE-2026-72807 8.0 HIGH SiYuan before v3.7.4 SQL Injection via queryBlocks template
CVE-2026-72801 7.5 HIGH SiYuan before v3.7.4 Information Disclosure via Encryption Key Material
CVE-2026-72808 5.8 MEDIUM SiYuan before v3.7.4 Information Disclosure via getFileAnnotation
CVE-2026-72790 5.8 MEDIUM SiYuan before v3.7.4 Information Disclosure via getNotebookInfo
CVE-2026-72796 5.8 MEDIUM SiYuan before v3.7.4 Access Control Bypass via Static Routes
CVE-2026-72805 5.8 MEDIUM SiYuan before v3.7.4 Information Disclosure via Block Endpoints
CVE-2026-72797 5.8 MEDIUM SiYuan before v3.7.4 Information Disclosure via getEncryptedNotebookStatus
CVE-2026-72788 5.8 MEDIUM SiYuan before v3.7.4 Information Disclosure via UILayout Filter
CVE-2026-72791 5.8 MEDIUM SiYuan before v3.7.4 Information Disclosure via getAttributeViewFieldViews
CVE-2026-72792 5.8 MEDIUM SiYuan before v3.7.4 Information Disclosure via Tag API
CVE-2026-72799 5.8 MEDIUM SiYuan before v3.7.4 Information Disclosure via Path Resolution
CVE-2026-72806 5.8 MEDIUM SiYuan before v3.7.4 Authentication Bypass via Attribute View
CVE-2026-72800 5.8 MEDIUM SiYuan before v3.7.4 Information Disclosure via Unfiltered API

Showing top 20 of 22 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-72803

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