CVE-2026-93923

HighCVSS 8.8/10Last modified Sep 21, 2026

Description

SiYuan through 3.8.4 fails to escape heading style attributes when rendering outline and bookmark dock HTML, allowing stored cross-site scripting. Attackers can supply crafted notebooks or call administrative endpoints to inject malicious style values that execute in the Electron renderer with full system access.

Metrics

CVSS 3.1 8.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-79

Affected software

No affected versions have been published.

Timeline

Published
Sep 19, 2026
Last modified
Sep 21, 2026
NVD status
Deferred

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CVE-2026-93923: High severity, CVSS 8.8 | Vulnix