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CVE-2026-54066— SiYuan: Path Traversal via Double URL Encoding in /assets/*path (publish mode arbitrary file─read)

Quick assessment

Affected
siyuan-note siyuan
Exploitation
Public or AI PoC available; prioritize validation
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团队开源的一个个人知识管理系统。 SiYuan 3.7.0之前版本存在安全漏洞，该漏洞源于对/assets/*path路由的路径清理不彻底，通过双重URL编码绕过，可能导致未经身份验证的远程攻击者在发布模式下读取WorkspaceDir内的任意文件。

CVSS 7.5 · High EPSS 2.39% · P83

Public Exploits 1

Nuclei · 1 CVE-2026-54066.yaml [template]

Affected Version Matrix 1

VendorProduct Version RangeStatus
siyuan-note siyuan < 3.7.0 affected
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I. Basic Information for CVE-2026-54066

Vulnerability Information
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Vulnerability Title
SiYuan: Path Traversal via Double URL Encoding in /assets/*path (publish mode arbitrary file─read)
Source: CVE Program / CVE List V5
Vulnerability Description
SiYuan is an open-source personal knowledge management system. Prior to 3.7.0, the patch for CVE-2026-41894 ("Path Traversal via Double URL Encoding") sanitized the /export/ route but the identical root cause remains in the /assets/*path route. In publish mode (anonymous read-only HTTP endpoint, default port 6808), an unauthenticated remote attacker can read arbitrary files inside WorkspaceDir — including conf/conf.json (which contains the AccessAuthCode SHA256 hash, API token, and sync keys), temp/siyuan.db, temp/blocktree.db, and siyuan.log — by double-URL-encoding .. segments. This vulnerability is fixed in 3.7.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A: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 配置错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
SiYuan是SiYuan团队开源的一个个人知识管理系统。 SiYuan 3.7.0之前版本存在安全漏洞，该漏洞源于对/assets/*path路由的路径清理不彻底，通过双重URL编码绕过，可能导致未经身份验证的远程攻击者在发布模式下读取WorkspaceDir内的任意文件。
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 < 3.7.0 -

II. Public POCs for CVE-2026-54066

# POC Description Source Link Shenlong Link
1 SiYuan <= 3.6.5 contains a path traversal via double URL-encoding in the /assets/ route (publish mode port 6808), allowing unauthenticated attackers to read arbitrary files inside WorkspaceDir including conf/conf.json which exposes the API token and access auth code. https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-54066.yaml POC Details
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III. Intelligence Information for CVE-2026-54066

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Vendor Advisories for CVE-2026-54066 (1)

Same Patch Batch · siyuan-note · 2026-06-24 · 9 CVEs total

CVE-2026-54158 9.9 CRITICAL SiYuan: Stored XSS to RCE via attribute-view cell rendering in genAVValueHTML()
CVE-2026-54067 9.9 CRITICAL SiYuan: Stored XSS to RCE via CSS-snippet <style> breakout in renderSnippet()
CVE-2026-50551 9.9 CRITICAL SiYuan: Stored XSS to RCE via Unsanitized Attribute View Asset Cell Content
CVE-2026-55570 9.0 CRITICAL SiYuan: Stored XSS results to Electron RCE in SiYuan marketplace via unescaped `data-obj`
CVE-2026-54070 7.1 HIGH SiYuan: Stored XSS in Bazaar marketplace via package README event handlers
CVE-2026-54068 5.9 MEDIUM SiYuan: Unauthenticated SQLite Data Exfiltration via Template Injection in /api/icon/getDy
CVE-2026-54759 SiYuan: Lute HTML sanitizer allows `<iframe>` tags in Bazaar package README, leading to ar
CVE-2026-54069 SiYuan: Unauthenticated Admin API Access via Blanket chrome-extension:// Origin Allowlist

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-54066

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