CVE-2026-34448
CriticalCVSS 9.0Exploitation Probability (EPSS)
Low risk39th percentile - higher than 39% of all known CVEs
Summary
SiYuan prior to version 3.6.2 allows stored XSS via a malicious URL in the Asset View field. In the Electron client, the XSS escalates to arbitrary OS command execution due to enabled nodeIntegration and disabled contextIsolation.
Risk Assessment
An attacker can execute arbitrary system commands on the victim's machine, leading to full data and system compromise.
Recommendation
Upgrade SiYuan to version 3.6.2 or later.
Original NVD description (English source)
SiYuan is a personal knowledge management system. Prior to version 3.6.2, an attacker who can place a malicious URL in an Attribute View mAsse field can trigger stored XSS when a victim opens the Gallery or Kanban view with “Cover From -> Asset Field” enabled. The vulnerable code accepts arbitrary http(s) URLs without extensions as images, stores the attacker-controlled string in coverURL, and injects it directly into an <img src="..."> attribute without escaping. In the Electron desktop client, the injected JavaScript executes with nodeIntegration enabled and contextIsolation disabled, so the XSS reaches arbitrary OS command execution under the victim’s account. This issue has been patched in version 3.6.2.