CVE-2026-59855: CWE-80: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) in siyuan-note siyuan
SiYuan is an open-source personal knowledge management system. Prior to 3.7.1, Asset.render in app/src/asset/index.ts interpolates the unsanitized this.path value into HTML assigned to innerHTML, allowing a crafted asset link containing a double quote to break out of the src attribute, inject an event handler, and execute JavaScript that can run OS commands in the Electron renderer. This issue is fixed in versions 3.7.1-alpha.2 and 3.7.1.
AI Analysis
Technical Summary
The vulnerability in SiYuan (CVE-2026-59855) is a CWE-80 improper neutralization of script-related HTML tags (basic XSS) in the Asset.render function located in app/src/asset/index.ts. Prior to version 3.7.1, the function interpolates the unsanitized this.path value into HTML assigned to innerHTML. An attacker can craft an asset link containing a double quote to break out of the src attribute, inject an event handler, and execute arbitrary JavaScript code. This JavaScript can run OS commands in the Electron renderer process, potentially leading to significant compromise. The issue is resolved in versions 3.7.1-alpha.2 and 3.7.1.
Potential Impact
Successful exploitation allows an attacker to execute arbitrary JavaScript code in the Electron renderer process, which can lead to running OS commands on the host system. This elevates the risk of remote code execution and system compromise. The vulnerability has a high CVSS 4.0 score of 8.6, indicating a high severity impact with network attack vector, low attack complexity, no privileges required, but user interaction needed.
Mitigation Recommendations
A fix is available and included starting from versions 3.7.1-alpha.2 and 3.7.1. Users should upgrade to at least version 3.7.1 to remediate this vulnerability. No other mitigation guidance is provided or required beyond applying the official update.
CVE-2026-59855: CWE-80: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) in siyuan-note siyuan
Description
SiYuan is an open-source personal knowledge management system. Prior to 3.7.1, Asset.render in app/src/asset/index.ts interpolates the unsanitized this.path value into HTML assigned to innerHTML, allowing a crafted asset link containing a double quote to break out of the src attribute, inject an event handler, and execute JavaScript that can run OS commands in the Electron renderer. This issue is fixed in versions 3.7.1-alpha.2 and 3.7.1.
CVSS v4.0
Score 8.6high
Affected software
pkg:github/siyuan-note/siyuanRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in SiYuan (CVE-2026-59855) is a CWE-80 improper neutralization of script-related HTML tags (basic XSS) in the Asset.render function located in app/src/asset/index.ts. Prior to version 3.7.1, the function interpolates the unsanitized this.path value into HTML assigned to innerHTML. An attacker can craft an asset link containing a double quote to break out of the src attribute, inject an event handler, and execute arbitrary JavaScript code. This JavaScript can run OS commands in the Electron renderer process, potentially leading to significant compromise. The issue is resolved in versions 3.7.1-alpha.2 and 3.7.1.
Potential Impact
Successful exploitation allows an attacker to execute arbitrary JavaScript code in the Electron renderer process, which can lead to running OS commands on the host system. This elevates the risk of remote code execution and system compromise. The vulnerability has a high CVSS 4.0 score of 8.6, indicating a high severity impact with network attack vector, low attack complexity, no privileges required, but user interaction needed.
Mitigation Recommendations
A fix is available and included starting from versions 3.7.1-alpha.2 and 3.7.1. Users should upgrade to at least version 3.7.1 to remediate this vulnerability. No other mitigation guidance is provided or required beyond applying the official update.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-07-07T15:41:53.606Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a50252a68715ace43310cf5
Added to database: 07/09/2026, 22:48:10 UTC
Last enriched: 07/17/2026, 09:30:09 UTC
Last updated: 08/23/2026, 22:52:12 UTC
Views: 109
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