Siyuan · Siyuan · CVE-2026-109309
**Name of the Vulnerable Software and Affected Versions**
SiYuan versions 3.7.0 through 3.8.5
**Description**
An absolute path traversal issue exists in the kernel's private plugin HTTP server. The server passes the `ResponseFile.Path` of a kernel plugin handler to the `Context.File` function without proper validation. This allows an attacker who provides a malicious kernel plugin to specify an absolute path and read any file accessible by the SiYuan process, such as the API token and `conf.json`.
**Recommendations**
Update SiYuan to version 3.8.6 or later.