CVE-2026-73042

CRITICAL 9.0

SiYuan before v3.7.4 Remote Code Execution via Menu Metadata

CVSS Score

9.0

EPSS Score

0.0%

EPSS Percentile

0th

SiYuan before v3.7.4 fails to properly escape database menu metadata in HTML interpolation, allowing stored values to execute script when users open group, view, or field-edit menus. Attackers can inject markup through field descriptions or names that close containing elements and execute arbitrary code via event handlers, reaching Node built-ins due to Electron's insecure configuration.

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

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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-gcm3-qcq3-72rv vulncheck.com: https://www.vulncheck.com/advisories/siyuan-before-remote-code-execution-via-menu-metadata

Credits

🔍 Shirshakhtml