CVE-2026-34448: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in siyuan-note siyuan
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.
AI Analysis
Technical Summary
SiYuan versions before 3.6.2 contain a stored XSS vulnerability (CWE-79) in the handling of URLs in the Attribute View mAsse field. The application accepts arbitrary HTTP(S) URLs without file extensions as images and directly injects them into the <img src="..."> attribute without escaping, enabling script injection. In the Electron desktop client context, the XSS can lead to arbitrary OS command execution because nodeIntegration is enabled and contextIsolation is disabled. The vulnerability is fixed in version 3.6.2.
Potential Impact
Successful exploitation allows an attacker to execute arbitrary JavaScript in the context of the victim’s application. In the Electron desktop client, this escalates to arbitrary OS command execution under the victim’s user account, potentially leading to full compromise of the victim’s environment. The CVSS score of 9.1 reflects the high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
This vulnerability is patched in SiYuan version 3.6.2. Users should upgrade to version 3.6.2 or later to remediate this issue. No additional mitigations are specified or required once the patch is applied.
CVE-2026-34448: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in siyuan-note siyuan
Description
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.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
SiYuan versions before 3.6.2 contain a stored XSS vulnerability (CWE-79) in the handling of URLs in the Attribute View mAsse field. The application accepts arbitrary HTTP(S) URLs without file extensions as images and directly injects them into the <img src="..."> attribute without escaping, enabling script injection. In the Electron desktop client context, the XSS can lead to arbitrary OS command execution because nodeIntegration is enabled and contextIsolation is disabled. The vulnerability is fixed in version 3.6.2.
Potential Impact
Successful exploitation allows an attacker to execute arbitrary JavaScript in the context of the victim’s application. In the Electron desktop client, this escalates to arbitrary OS command execution under the victim’s user account, potentially leading to full compromise of the victim’s environment. The CVSS score of 9.1 reflects the high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
This vulnerability is patched in SiYuan version 3.6.2. Users should upgrade to version 3.6.2 or later to remediate this issue. No additional mitigations are specified or required once the patch is applied.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-03-27T18:18:14.895Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 69cc424fe6bfc5ba1d44f4a5
Added to database: 3/31/2026, 9:53:19 PM
Last enriched: 4/7/2026, 11:19:36 PM
Last updated: 5/15/2026, 2:05:36 PM
Views: 132
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