CVE-2026-85580
MEDIUM
NVD
CVSS Score
6.5
Severity
MEDIUM
Published
Sep 04, 2026
Vendor
unknown
Description
SiYuan versions before v3.8.2 contain a path guard bypass vulnerability in the MCP file-access handler that uses case-sensitive matching on Linux filesystems. Attackers can read the protected publishAccess.json file by requesting case-variant paths like PublishAccess.json to disclose sensitive publish-access configuration and metadata.