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OpenAdvisories
High · 7.3 CVE-2026-87811 EUVD-2026-74837GHSA-qx37-mp6w-43mm

SiYuan before v3.8.2 Stored XSS via notebook template paths

Published Sep 9, 2026 · Updated Sep 9, 2026 · Assigned by VulnCheck

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.

Affected products

VendorProductAffectedFixed
siyuan-note siyuan < 3.8.2 3.8.2

References