CVE-2026-73042

Critical

Description

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.

SeverityCritical

CVSS9.0

Exploit probability—

ProductSiyuan

PublishedAug 15, 2026

First seenAug 15, 2026

Weakness typeCWE-79Cross-site scripting (XSS)

How to fix

Update

siyuan-note siyuan3.7.4 or later

Vendor advisories

github.com/siyuan-note/siyuan/security/advisories/GHSA-gcm3-qcq3-72rv

Affected products

Product	Affected versions	Fixed in
siyuan-note siyuan	v < 3.7.4	3.7.4

Check your version

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