CVE-2026-59833: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in siyuan-note siyuan
SiYuan is an open-source personal knowledge management system. Prior to 3.7.1, SiYuan renders note and package content to HTML through the Lute engine with sanitization enabled, but Lute's dangerous javascript scheme block does not check form action or SVG xlink:href attributes, allowing stored cross-site scripting in document export-preview and Bazaar package README render paths that can execute OS commands in the Electron desktop renderer. This issue is fixed in versions 3.7.1.
AI Analysis
Technical Summary
CVE-2026-59833 is a stored cross-site scripting vulnerability in SiYuan versions before 3.7.1. The Lute rendering engine, despite having sanitization enabled, fails to block dangerous JavaScript schemes in form action and SVG xlink:href attributes. This flaw allows attackers to inject malicious scripts that execute OS commands in the Electron desktop environment when rendering exported documents or Bazaar package README files. The vulnerability is addressed in SiYuan 3.7.1.
Potential Impact
Successful exploitation can lead to execution of arbitrary OS commands within the Electron desktop renderer context. This elevates the risk of remote code execution on the affected system, potentially compromising user data and system integrity. The CVSS 4.0 base score is 8.6 (high), reflecting network attack vector, no privileges required, user interaction needed, and high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
Upgrade SiYuan to version 3.7.1 or later, where this vulnerability is fixed. No other official remediation or temporary fixes are documented. Users should apply this update promptly to prevent exploitation.
CVE-2026-59833: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in siyuan-note siyuan
Description
SiYuan is an open-source personal knowledge management system. Prior to 3.7.1, SiYuan renders note and package content to HTML through the Lute engine with sanitization enabled, but Lute's dangerous javascript scheme block does not check form action or SVG xlink:href attributes, allowing stored cross-site scripting in document export-preview and Bazaar package README render paths that can execute OS commands in the Electron desktop renderer. This issue is fixed in versions 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.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-59833 is a stored cross-site scripting vulnerability in SiYuan versions before 3.7.1. The Lute rendering engine, despite having sanitization enabled, fails to block dangerous JavaScript schemes in form action and SVG xlink:href attributes. This flaw allows attackers to inject malicious scripts that execute OS commands in the Electron desktop environment when rendering exported documents or Bazaar package README files. The vulnerability is addressed in SiYuan 3.7.1.
Potential Impact
Successful exploitation can lead to execution of arbitrary OS commands within the Electron desktop renderer context. This elevates the risk of remote code execution on the affected system, potentially compromising user data and system integrity. The CVSS 4.0 base score is 8.6 (high), reflecting network attack vector, no privileges required, user interaction needed, and high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
Upgrade SiYuan to version 3.7.1 or later, where this vulnerability is fixed. No other official remediation or temporary fixes are documented. Users should apply this update promptly to prevent exploitation.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-07-07T15:00:50.979Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a50252a68715ace43310cdf
Added to database: 07/09/2026, 22:48:10 UTC
Last enriched: 07/17/2026, 09:55:46 UTC
Last updated: 08/23/2026, 22:52:12 UTC
Views: 85
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.