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CVE-2026-103763— SiYuan before v3.8.5 Information Disclosure via /api/notebook/getNotebookInfo

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.

思源笔记（SiYuan）在 v3.8.5 版本之前存在一个信息泄露漏洞，该漏洞允许只读的发布读者通过 getNotebookInfo 端点获取被排除在发布范围外的文档的元数据。攻击者，包括在未设置读者密码时的匿名访问者，可以通过查询可发布的笔记本，获取被隐藏文档的文档数量、大小以及修改时间戳。

CVSS 5.8 · Medium EPSS 0.31% · P22

Possible ATT&CK Techniques 1 AI

T1005 · Data from Local System

Affected Version Matrix 2

VendorProduct Version RangeStatus
siyuan-note siyuan < 3.8.5 affected
3.8.5 unaffected
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I. Basic Information for CVE-2026-103763

Vulnerability Information
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Vulnerability Title
SiYuan before v3.8.5 Information Disclosure via /api/notebook/getNotebookInfo
Source: CVE Program / CVE List V5
Vulnerability Description
SiYuan before v3.8.5 contains an information disclosure vulnerability that allows read-only publish readers to learn metadata of publish-excluded documents through the getNotebookInfo endpoint. Attackers, including anonymous visitors when no reader password is set, can query publish-visible notebooks to obtain document count, size and modification timestamps of hidden documents.
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
信息暴露
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
siyuan-note siyuan 0 ~ 3.8.5 -

II. Public POCs for CVE-2026-103763

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III. Intelligence Information for CVE-2026-103763

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Vendor Advisories for CVE-2026-103763 (2)

Same Patch Batch · siyuan-note · 2026-10-02 · 3 CVEs total

CVE-2026-104410 7.5 HIGH SiYuan before 3.8.5 Information Disclosure via /api/export/preview
CVE-2026-103762 5.3 MEDIUM SiYuan before v3.8.5 Missing Authorization in Save-Path Resolver Endpoints

IV. Related Vulnerabilities

Same product: siyuan
Same vendor: siyuan-note
Same weakness: CWE-200

V. Comments for CVE-2026-103763

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