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CVE-2026-66395

SiYuan

Description

SiYuan desktop before v3.7.2 contains a reflected cross-site scripting vulnerability in the bazaar plugin readme handler that allows attackers to execute arbitrary code by crafting a malicious siyuan:// deep link. Attackers can inject HTML payloads via the plugin name parameter that execute with full Node.js access through insertAdjacentHTML rendering in an insecurely configured Electron renderer.

CVSS 9.6EPSS 0.327%Risk 0.99
View source
Published
2026-07-27 16:18:12
Affected versions
<3.7.2
Type
Critical software
Last modified
2026-07-28 16:07:15
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H