VULNERABILITY INTELLIGENCE
CVE-2026-66396
CVSS score8.4 HIGH
EPSS probability0.54%
CISA KEVNot currently listed
Published2026-07-27
Last modified2026-10-24
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H
Description
SiYuan before v3.7.2 fails to escape the title-img Individual Attribute List value when rendering Gallery and Kanban cover images, allowing stored cross-site scripting via unescaped style attribute interpolation. Attackers with editor permissions can inject onload handlers that execute arbitrary code in the Electron renderer with full Node.js access when victims open affected documents.
Weakness classification
- disclosure@vulncheck.com: CWE-79