CVE-2026-73043: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in siyuan-note siyuan
SiYuan versions before v3.7.4 contain a remote code execution vulnerability in the Template calculation operator, which renders user-authored Go templates and stores output verbatim without sanitization. Attackers can inject malicious HTML and JavaScript into template calculations that execute in the desktop client renderer with Node integration enabled, allowing arbitrary code execution when the database is opened.
AI Analysis
Technical Summary
CVE-2026-73043 describes a remote code execution vulnerability in SiYuan note-taking software versions prior to v3.7.4. The flaw exists in the Template calculation operator that renders user-authored Go templates and stores the output without sanitization. This allows attackers to inject malicious HTML and JavaScript that execute in the desktop client renderer environment with Node integration enabled, leading to arbitrary code execution upon database opening. The vulnerability has a CVSS 4.0 score of 9.4, indicating critical severity. No official patch or remediation level is currently stated in the available data.
Potential Impact
Successful exploitation allows an attacker to execute arbitrary code remotely on the victim's machine by injecting malicious scripts into template calculations. This can compromise the desktop client environment with Node integration enabled, potentially leading to full system compromise when the database is opened.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should avoid opening untrusted databases or templates in the SiYuan desktop client, especially if Node integration is enabled.
CVE-2026-73043: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in siyuan-note siyuan
Description
SiYuan versions before v3.7.4 contain a remote code execution vulnerability in the Template calculation operator, which renders user-authored Go templates and stores output verbatim without sanitization. Attackers can inject malicious HTML and JavaScript into template calculations that execute in the desktop client renderer with Node integration enabled, allowing arbitrary code execution when the database is opened.
CVSS v4.0
Score 9.4critical
Affected software
siyuan-note
siyuan
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-73043 describes a remote code execution vulnerability in SiYuan note-taking software versions prior to v3.7.4. The flaw exists in the Template calculation operator that renders user-authored Go templates and stores the output without sanitization. This allows attackers to inject malicious HTML and JavaScript that execute in the desktop client renderer environment with Node integration enabled, leading to arbitrary code execution upon database opening. The vulnerability has a CVSS 4.0 score of 9.4, indicating critical severity. No official patch or remediation level is currently stated in the available data.
Potential Impact
Successful exploitation allows an attacker to execute arbitrary code remotely on the victim's machine by injecting malicious scripts into template calculations. This can compromise the desktop client environment with Node integration enabled, potentially leading to full system compromise when the database is opened.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should avoid opening untrusted databases or templates in the SiYuan desktop client, especially if Node integration is enabled.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-08-10T19:06:03.365Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a80e09bbf8831d539c1fdfe
Added to database: 08/15/2026, 21:56:43 UTC
Last enriched: 08/23/2026, 13:27:18 UTC
Last updated: 09/30/2026, 06:54:41 UTC
Views: 31
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