CVE-2026-92985: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in siyuan-note siyuan
SiYuan versions before 3.8.4 fail to escape bookmark labels imported from notebook files when rendering them in the dock tree. Attackers can craft malicious .sy notebook files with unescaped HTML in bookmark attributes that execute scripts in the Electron renderer with access to child_process for command execution.
AI Analysis
Technical Summary
SiYuan versions prior to 3.8.4 improperly neutralize input during web page generation by failing to escape bookmark labels imported from notebook files. This leads to a cross-site scripting vulnerability where attackers can craft malicious .sy notebook files containing unescaped HTML in bookmark attributes. When rendered in the dock tree, these scripts execute in the Electron renderer context, which has access to the child_process module, potentially allowing arbitrary command execution.
Potential Impact
Successful exploitation allows an attacker to execute arbitrary scripts within the Electron renderer process, which can escalate to arbitrary command execution on the host system via the child_process module. This can lead to full system compromise or unauthorized actions performed with the privileges of the user running SiYuan.
Mitigation Recommendations
Users should upgrade SiYuan to version 3.8.4 or later, where this vulnerability is fixed. Since the vulnerability is patched in 3.8.4, applying this official fix fully mitigates the issue.
CVE-2026-92985: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in siyuan-note siyuan
Description
SiYuan versions before 3.8.4 fail to escape bookmark labels imported from notebook files when rendering them in the dock tree. Attackers can craft malicious .sy notebook files with unescaped HTML in bookmark attributes that execute scripts in the Electron renderer with access to child_process for command execution.
CVSS v4.0
Score 8.6high
Affected software
siyuan-note
siyuan
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
SiYuan versions prior to 3.8.4 improperly neutralize input during web page generation by failing to escape bookmark labels imported from notebook files. This leads to a cross-site scripting vulnerability where attackers can craft malicious .sy notebook files containing unescaped HTML in bookmark attributes. When rendered in the dock tree, these scripts execute in the Electron renderer context, which has access to the child_process module, potentially allowing arbitrary command execution.
Potential Impact
Successful exploitation allows an attacker to execute arbitrary scripts within the Electron renderer process, which can escalate to arbitrary command execution on the host system via the child_process module. This can lead to full system compromise or unauthorized actions performed with the privileges of the user running SiYuan.
Mitigation Recommendations
Users should upgrade SiYuan to version 3.8.4 or later, where this vulnerability is fixed. Since the vulnerability is patched in 3.8.4, applying this official fix fully mitigates the issue.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-09-17T13:55:53.935Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6aabfa1355bf5e2cf57f75e3
Added to database: 09/17/2026, 14:32:51 UTC
Last enriched: 09/17/2026, 14:47:00 UTC
Last updated: 09/17/2026, 23:38:33 UTC
Views: 8
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.