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CVE-2026-103762— SiYuan before v3.8.5 Missing Authorization in Save-Path Resolver Endpoints

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 之前的版本中存在一个缺失授权验证的漏洞，该漏洞出现在 、 和 接口中。此漏洞允许具有只读发布权限的访客获取未发布的笔记本盒（notebook box）ID。具有只读发布访问权限或匿名访问权限的攻击者，可以通过向任意公开的笔记本 ID 发送 POST 请求，从而获取全局保存盒 ID 和保存路径模板，进而暴露隐藏笔记本的存在及其创建时间。

CVSS 5.3 · Medium EPSS 0.24% · P13

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage

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-2026-103762

Vulnerability Information
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Vulnerability Title
SiYuan before v3.8.5 Missing Authorization in Save-Path Resolver Endpoints
Source: CVE Program / CVE List V5
Vulnerability Description
SiYuan before v3.8.5 contains a missing authorization vulnerability in the getRefCreateSavePath, getShorthandSavePath, and getDocCreateSavePath endpoints that allows read-only publish visitors to learn unpublished notebook box IDs. Attackers with read-only or anonymous publish access can POST any open notebook ID to receive the global save-box ID and save-path template, revealing a hidden notebook's existence and creation time.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/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

Affected Products

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

II. Public POCs for CVE-2026-103762

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III. Intelligence Information for CVE-2026-103762

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Vendor Advisories for CVE-2026-103762 (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-2026-103763 5.8 MEDIUM SiYuan before v3.8.5 Information Disclosure via /api/notebook/getNotebookInfo

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-103762

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