CVE-2026-82654
HIGH
NVD
CVSS Score
8.9
Severity
HIGH
Published
Aug 30, 2026
Vendor
unknown
Description
SiYuan before v3.8.1 fails to properly escape block name, alias, and memo fields in hint, backlink, and breadcrumb rendering functions. Attackers can set a block's name to contain HTML/script tags that execute when another user views documents referencing or displaying that block.