CVE-2026-82233— SiYuan before v3.8.1 Path Traversal via asset.upload
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 3.8.1之前版本存在路径遍历漏洞，该漏洞源于asset.upload MCP工具接受任意绝对文件路径且未进行工作区边界验证，攻击者可通过提示注入诱导AI Agent从工作区外部上传SSH密钥或凭据等敏感文件到资产目录。
Affected Version Matrix 2
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| siyuan-note | siyuan | < 3.8.1 |
affected |
3.8.1 |
unaffected |
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I. Basic Information for CVE-2026-82233
Vulnerability Information
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Vulnerability Title
SiYuan before v3.8.1 Path Traversal via asset.upload
Source: CVE Program / CVE List V5
Vulnerability Description
SiYuan before v3.8.1 contains a path traversal vulnerability in the asset.upload MCP tool that accepts arbitrary absolute file paths without workspace boundary validation. Attackers can induce the AI Agent to upload sensitive files such as SSH keys or credentials from outside the workspace into the asset directory through prompt injection.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/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 路径遍历漏洞
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 3.8.1之前版本存在路径遍历漏洞，该漏洞源于asset.upload MCP工具接受任意绝对文件路径且未进行工作区边界验证，攻击者可通过提示注入诱导AI Agent从工作区外部上传SSH密钥或凭据等敏感文件到资产目录。
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 ~ 3.8.1 | - |
|
II. Public POCs for CVE-2026-82233
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Vendor Advisories for CVE-2026-82233 (2)
-
-
🔗 SiYuan before v3.8.1 Path Traversal via asset.upload | Advisories | VulnCheck third-party-advisory
IV. Related Vulnerabilities
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CVE-2026-103763
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Same vendor: siyuan-note
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CVE-2026-109310
SiYuan v3.1.12 before v3.8.6 Denial of Service via getDynami -
CVE-2026-109309
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SiYuan before 3.8.5 Information Disclosure via /api/export/p -
CVE-2026-103762
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Same weakness: CWE-22
-
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V. Comments for CVE-2026-82233
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