CVE-2026-82233: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in siyuan-note siyuan
Description
SiYuan before version 3.8.1 has a path traversal vulnerability in its asset.upload MCP tool. This flaw allows attackers to specify arbitrary absolute file paths without validating workspace boundaries. Consequently, an attacker can trick the AI Agent into uploading sensitive files from outside the workspace, such as SSH keys or credentials, into the asset directory via prompt injection.
CVSS v4.0
Score 6.9medium
Affected software
siyuan-note
siyuan
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-82233 describes a path traversal vulnerability in SiYuan note-taking software versions prior to 3.8.1. The vulnerability exists in the asset.upload MCP tool, which improperly limits pathname access by accepting arbitrary absolute file paths without enforcing workspace boundary validation. This enables attackers to induce the AI Agent to upload sensitive files located outside the intended workspace directory into the asset directory through crafted prompt injection attacks.
Potential Impact
An attacker with limited privileges and user interaction can exploit this vulnerability to cause the AI Agent to upload sensitive files such as SSH keys or credentials from outside the workspace. This could lead to unauthorized disclosure of sensitive information stored on the system.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround has been documented at this time.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-08-28T10:37:04.620Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a916f8facd9273b49cf9296
Added to database: 08/28/2026, 11:22:55 UTC
Last enriched: 09/07/2026, 15:31:54 UTC
Last updated: 10/13/2026, 18:48:24 UTC
Views: 104
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