CVE-2026-54069: CWE-346: Origin Validation Error in siyuan-note siyuan
SiYuan is an open-source personal knowledge management system. Prior to 3.7.0, SiYuan Note's kernel HTTP server unconditionally trusts all chrome-extension:// origins, granting RoleAdministrator access to every installed browser extension without any authentication. Combined with the default empty AccessAuthCode on desktop installs, any Chrome/Chromium extension -- including a compromised legitimate extension via supply chain attack -- can make fully authenticated admin API calls to the SiYuan kernel at 127.0.0.1:6806, enabling data exfiltration, stored XSS injection, and configuration tampering. This vulnerability is fixed in 3.7.0.
AI Analysis
Technical Summary
CVE-2026-54069 is an origin validation error (CWE-346) affecting SiYuan Note's kernel HTTP server in versions prior to 3.7.0. The server incorrectly trusts all chrome-extension:// origins without authentication, allowing any installed Chrome/Chromium extension to escalate privileges to RoleAdministrator on the local SiYuan kernel API. This privilege escalation enables unauthorized administrative actions including data theft, stored XSS injection, and configuration changes. The vulnerability is fixed in SiYuan Note version 3.7.0.
Potential Impact
Exploitation of this vulnerability allows any Chrome or Chromium extension installed on the user's system to gain administrative privileges on the SiYuan kernel API running on localhost. This can lead to unauthorized data exfiltration, injection of malicious scripts (stored XSS), and tampering with application configurations, potentially compromising the confidentiality, integrity, and availability of the user's data and application state.
Mitigation Recommendations
A fix is available in SiYuan Note version 3.7.0. Users and administrators should upgrade to version 3.7.0 or later to remediate this vulnerability. No additional mitigations are specified in the vendor advisory.
CVE-2026-54069: CWE-346: Origin Validation Error in siyuan-note siyuan
Description
SiYuan is an open-source personal knowledge management system. Prior to 3.7.0, SiYuan Note's kernel HTTP server unconditionally trusts all chrome-extension:// origins, granting RoleAdministrator access to every installed browser extension without any authentication. Combined with the default empty AccessAuthCode on desktop installs, any Chrome/Chromium extension -- including a compromised legitimate extension via supply chain attack -- can make fully authenticated admin API calls to the SiYuan kernel at 127.0.0.1:6806, enabling data exfiltration, stored XSS injection, and configuration tampering. This vulnerability is fixed in 3.7.0.
CVSS v4.0
Score 9.2critical
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
CVE-2026-54069 is an origin validation error (CWE-346) affecting SiYuan Note's kernel HTTP server in versions prior to 3.7.0. The server incorrectly trusts all chrome-extension:// origins without authentication, allowing any installed Chrome/Chromium extension to escalate privileges to RoleAdministrator on the local SiYuan kernel API. This privilege escalation enables unauthorized administrative actions including data theft, stored XSS injection, and configuration changes. The vulnerability is fixed in SiYuan Note version 3.7.0.
Potential Impact
Exploitation of this vulnerability allows any Chrome or Chromium extension installed on the user's system to gain administrative privileges on the SiYuan kernel API running on localhost. This can lead to unauthorized data exfiltration, injection of malicious scripts (stored XSS), and tampering with application configurations, potentially compromising the confidentiality, integrity, and availability of the user's data and application state.
Mitigation Recommendations
A fix is available in SiYuan Note version 3.7.0. Users and administrators should upgrade to version 3.7.0 or later to remediate this vulnerability. No additional mitigations are specified in the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-06-11T18:24:35.097Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a3c501e4853345fc1e45c45
Added to database: 06/24/2026, 21:46:06 UTC
Last enriched: 07/11/2026, 09:50:23 UTC
Last updated: 08/08/2026, 12:41:11 UTC
Views: 71
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