PT-2026-64997

CVE-2026-66396

Published

2026-07-27

Updated

2026-09-17

Description by

CVSS 4.0

9.3

Critical

MetricsAV:N/AC:L/AT:N/PR:H/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Name of the Vulnerable Software and Affected Versions SiYuan versions prior to 3.7.2

Description Stored cross-site scripting is possible due to improper escaping of the title-img Individual Attribute List value during the rendering of Gallery and Kanban cover images. This occurs via unescaped style attribute interpolation. Users with editor permissions can inject onload handlers to execute arbitrary code within the Electron renderer, which grants full Node.js access when a victim opens the affected documents.

Recommendations Update to version 3.7.2 or later.

Exploitability

Exploit

Fix

Impacts

Researchers

Vendors

Affected products

Weakness enumeration

CWE-79: Improper Neutralization of Input During Web Page Generation (\'Cross-site Scripting\')

Related identifiers

CVE-2026-66396