CVE-2026-116168
SiYuan before v3.8.7 Path Traversal Local File Read via MCP Asset Tool
CVSS Score
6.2
EPSS Score
0.0%
EPSS Percentile
0th
SiYuan before 3.8.7 contains a path traversal vulnerability in the MCP asset tool because validateAssetUploadPaths relies on an incomplete sensitive-path blacklist that omits .env and other secret files. Authenticated attackers driving the MCP asset upload action can copy such local files into the workspace and read them back via /assets/ over HTTP.
| CWE | CWE-22 |
| Vendor | siyuan-note |
| Product | siyuan |
| Published | Oct 25, 2026 |
Stay Ahead of the Next One
Get instant alerts for siyuan-note siyuan
Be the first to know when new medium vulnerabilities affecting siyuan-note siyuan are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Affected Versions
siyuan-note / siyuan
0 < 3.8.7
References
Credits
🔍 overtimepog