CVE-2026-73053

CRITICAL 9.0

SiYuan before v3.7.4 Cross-Site Scripting via unicode2Emoji

CVSS Score

9.0

EPSS Score

0.0%

EPSS Percentile

0th

SiYuan versions before v3.7.4 contain a cross-site scripting vulnerability in the unicode2Emoji function that fails to sanitize codepoint branch output. Attackers can craft document icons with hex-encoded markup that executes in the renderer with Node integration enabled, achieving arbitrary code execution on the host system.

CWE	CWE-79
Vendor	siyuan-note
Product	siyuan
Published	Aug 15, 2026

Stay Ahead of the Next One

Get instant alerts for siyuan-note siyuan

Be the first to know when new critical vulnerabilities affecting siyuan-note siyuan are published — delivered to Slack, Telegram or Discord.

Get Free Alerts → Free · No credit card · 60 sec setup

CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

siyuan-note / siyuan

0 < 3.7.4

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/siyuan-note/siyuan/security/advisories/GHSA-vx5w-qrvp-mmcq vulncheck.com: https://www.vulncheck.com/advisories/siyuan-before-cross-site-scripting-via-unicode2emoji

Credits

🔍 Shirshakhtml