PT-2026-63972 · Siyuan Note · Siyuan

Hyuunnn · CVE-2026-65606 · Published 2026-07-23 · Updated 2026-07-23

NVD

CVSS v3.1

9.6

Critical

Base vector

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

SiYuan before v3.7.2 contains a cross-site scripting vulnerability in the siyuan:// protocol handler. When a siyuan://plugins/ link references a name that is not an installed plugin, the application opens a custom tab and inserts the link's icon parameter into the tab header via innerHTML without escaping it (app/src/layout/Tab.ts), allowing injection of an element. Because the SiYuan Desktop renderer runs with nodeIntegration:true, the injected JavaScript can access Node's require and call require('child process').execSync(...), escalating the cross-site scripting into arbitrary operating-system command execution.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-65606

Affected Products

Siyuan

References · 4

• https://github.com/siyuan-note/siyuan/security/advisories/GHSA-wp64-x7qh-h728 · Vendor Advisory
• https://github.com/siyuan-note/siyuan/commit/41f2861c87575ff5ac4b50a0520b1a4fe55b4a70 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-65606 · Security Note
• https://vulncheck.com/advisories/siyuan-before-cross-site-scripting-to-rce · Note