CVE-2026-87811
HIGH
NVD
CVSS Score
7.3
Severity
HIGH
Published
Sep 09, 2026
Vendor
unknown
Description
SiYuan before v3.8.2 inserts persisted notebook template paths into HTML input value attributes without proper attribute encoding. Attackers can craft malicious template paths that break out of the attribute context and execute JavaScript when a victim opens notebook configuration, enabling same-origin API requests and application state manipulation.