SiYuan: Remote Code Execution in the Electron desktop client via stored XSS in synced table captions

Summary A malicious note synced to another user can trigger remote code execution in the SiYuan Electron desktop client. The root cause is that table caption content is stored without safe escaping and later unescaped into rendered HTML, creating a stored XSS sink. Because the desktop renderer ru...

CVE-2026-39846

CVE-2026-39846 – SiYuan Electron desktop client is affected prior to 3.6.4. A crafted note with table caption content that is stored without safe escaping can be unescaped in rendered HTML, creating a stored XSS sink. Since the desktop renderer runs with nodeIntegration enabled and contextIsolati...

CVE-2026-39846 SiYuan affected by Remote Code Execution in the Electron desktop client via stored XSS in synced table captions

SiYuan is a personal knowledge management system. Prior to 3.6.4, a malicious note synced to another user can trigger remote code execution in the SiYuan Electron desktop client. The root cause is that table caption content is stored without safe escaping and later unescaped into rendered HTML,...

PT-2026-31031

Name of the Vulnerable Software and Affected Versions SiYuan versions prior to 3.6.4 Description SiYuan, a personal knowledge management system, is susceptible to remote code execution in the Electron desktop client prior to version 3.6.4. This occurs because table caption content is stored and...