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CVE-2026-41894— SiYuan: Incomplete Fix Bypass for CVE-2026-30869: Path Traversal via Double URL Encoding in `/export/` Endpoint

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开源的一个个人知识管理系统。 SiYuan 3.6.5之前版本存在路径遍历漏洞，该漏洞源于修复CVE-2026-30869时仅添加黑名单检查但未解决serveExport函数中冗余的url.PathUnescape调用，导致经过身份验证的攻击者使用双重URL编码遍历目录并读取任意工作区文件。

AI Predicted 8.8 Difficulty: Easy EPSS 0.46% · P38
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I. Basic Information for CVE-2026-41894

Vulnerability Information
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Vulnerability Title
SiYuan: Incomplete Fix Bypass for CVE-2026-30869: Path Traversal via Double URL Encoding in `/export/` Endpoint
Source: CVE Program / CVE List V5
Vulnerability Description
SiYuan is an open-source personal knowledge management system. Prior to 3.6.5, the fix for CVE-2026-30869 only added a denylist check (IsSensitivePath) but did not address the root cause — a redundant url.PathUnescape() call in serveExport(). An authenticated attacker can use double URL encoding (%252e%252e) to traverse directories and read arbitrary workspace files including the full SQLite database (siyuan.db), kernel log, and all user documents. This vulnerability is fixed in 3.6.5.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
SiYuan 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
SiYuan是SiYuan开源的一个个人知识管理系统。 SiYuan 3.6.5之前版本存在路径遍历漏洞，该漏洞源于修复CVE-2026-30869时仅添加黑名单检查但未解决serveExport函数中冗余的url.PathUnescape调用，导致经过身份验证的攻击者使用双重URL编码遍历目录并读取任意工作区文件。
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 < 3.6.5 -

II. Public POCs for CVE-2026-41894

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III. Intelligence Information for CVE-2026-41894

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Patches & Fixes for CVE-2026-41894 (1)

Vendor Advisories for CVE-2026-41894 (1)

Vendor Pages for CVE-2026-41894 (1)

IV. Related Vulnerabilities

Same product: siyuan
Same vendor: siyuan-note
Same weakness: CWE-22

V. Comments for CVE-2026-41894

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