CVE-2026-109309
Medium
Description
SiYuan v3.7.0 before v3.8.6 contains an absolute path traversal vulnerability in the kernel's private plugin HTTP server, which passes a kernel plugin handler's ResponseFile.Path to gin's Context.File without validation. Attackers supplying a malicious kernel plugin can return an absolute path to read any file readable by the SiYuan process, including the API token and conf.json.
SeverityMedium
CVSS6.5
Exploit probability—
ProductSiyuan
PublishedOct 12, 2026
First seenOct 12, 2026
Weakness typeCWE-22Path traversal
How to fix
Update
- siyuan-note siyuan3.8.6 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| siyuan-note siyuan | 3.7.0 ≤ v < 3.8.6 | 3.8.6 |
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