CVE-2026-100637
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 checkoutRepo endpoint that allows authenticated administrators to write JSON files outside the workspace. Attackers can supply a sessionID parameter containing directory traversal sequences to overwrite arbitrary JSON files in pre-existing kernel-writable directories outside workspace boundaries.