CVE-2026-65606 PUBLISHED

SiYuan before v3.7.2 Cross-Site Scripting to RCE

Assigner: VulnCheck
Reserved: 22.07.2026 Published: 23.07.2026 Updated: 23.07.2026

SiYuan before v3.7.2 contains a cross-site scripting vulnerability in the siyuan:// protocol handler. When a siyuan://plugins/<name> 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 <img onerror=...> 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.

Metrics

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
CVSS Score: 9.4

Product Status

Vendor siyuan-note
Product siyuan
Versions Default: unaffected
  • affected from 0 to 3.7.2 (excl.)
  • Version 3.7.2 is unaffected

Credits

  • hyuunnn reporter

References

Problem Types

  • Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') CWE