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CVE-2026-86191— SiYuan before v3.8.2 Private Attribute View Key Enumeration

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团队开源的一个以隐私为先的个人知识管理系统。 SiYuan 3.8.2之前版本存在授权问题漏洞，该漏洞源于getAttributeViewKeysByID端点未验证父数据库可见性，可能导致发布读者枚举私有属性视图键定义，攻击者可利用该端点检索隐藏数据库中包含敏感字段名和关系定义的完整键模式。

CVSS 4.3 · Medium EPSS 0.28% · P20

Possible ATT&CK Techniques 1 AI

T1213 · Data from Information Repositories

Affected Version Matrix 2

VendorProduct Version RangeStatus
siyuan-note siyuan < 3.8.2 affected
3.8.2 unaffected
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I. Basic Information for CVE-2026-86191

Vulnerability Information
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Vulnerability Title
SiYuan before v3.8.2 Private Attribute View Key Enumeration
Source: CVE Program / CVE List V5
Vulnerability Description
SiYuan versions before v3.8.2 contain an information disclosure vulnerability in the getAttributeViewKeysByID endpoint that allows publish readers to enumerate private attribute view key definitions without verifying parent database visibility. Attackers can access the endpoint to retrieve complete key schemas including sensitive field names and relation definitions from hidden databases.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
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团队开源的一个以隐私为先的个人知识管理系统。 SiYuan 3.8.2之前版本存在授权问题漏洞，该漏洞源于getAttributeViewKeysByID端点未验证父数据库可见性，可能导致发布读者枚举私有属性视图键定义，攻击者可利用该端点检索隐藏数据库中包含敏感字段名和关系定义的完整键模式。
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 ~ 3.8.2 -

II. Public POCs for CVE-2026-86191

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III. Intelligence Information for CVE-2026-86191

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Vendor Advisories for CVE-2026-86191 (2)

IV. Related Vulnerabilities

Same product: siyuan
Same vendor: siyuan-note
Same weakness: CWE-639

V. Comments for CVE-2026-86191

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