CVE-2026-87811 — SiYuan before v3.8.2 Stored XSS via notebook template paths
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 t…
Published: 2026-09-09 · CVSS: 8.4 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7