CVE-2026-100638
HIGH
NVD
CVSS Score
7.6
Severity
HIGH
Published
Sep 26, 2026
Vendor
unknown
Description
SiYuan versions before v3.8.4 contain a path traversal vulnerability in the setNotebookIcon endpoint that allows authenticated administrators to create arbitrary directory trees and write files outside the workspace boundary. Attackers can supply directory traversal sequences in the notebook parameter to escape the workspace data directory and write conf.json files to arbitrary locations accessible by the kernel process.