CVE-2026-54069: CWE-346: Origin Validation Error in siyuan-note siyuan
SiYuan Note versions prior to 3.7.0 have an origin validation vulnerability in their kernel HTTP server. The server trusts all chrome-extension:// origins without authentication, granting RoleAdministrator access to any installed Chrome/Chromium extension. This allows extensions, including compromised ones, to make authenticated admin API calls to the local SiYuan kernel, potentially leading to data exfiltration, stored XSS injection, and configuration tampering. The vulnerability is fixed in version 3.7.0.
AI Analysis
Technical Summary
CVE-2026-54069 describes an origin validation error (CWE-346) in SiYuan Note's kernel HTTP server before version 3.7.0. The server unconditionally trusts all chrome-extension:// origins, granting administrative privileges to every installed browser extension without requiring authentication. Because the default AccessAuthCode is empty on desktop installs, any Chrome or Chromium extension, including those compromised via supply chain attacks, can perform fully authenticated admin API calls to the SiYuan kernel at 127.0.0.1:6806. This enables attackers to exfiltrate data, inject stored cross-site scripting payloads, and tamper with configuration settings. The issue is resolved in SiYuan Note 3.7.0.
Potential Impact
Attackers controlling or compromising any Chrome/Chromium extension can gain administrative access to the SiYuan Note kernel HTTP server on the local machine. This access allows them to exfiltrate sensitive data, inject malicious scripts (stored XSS), and alter application configurations, potentially compromising the confidentiality, integrity, and availability of the user's data and application environment.
Mitigation Recommendations
This vulnerability is fixed in SiYuan Note version 3.7.0. Users should upgrade to version 3.7.0 or later to remediate the issue. No official patch or temporary fix is indicated beyond upgrading. Since this is a desktop application, the vendor does not manage remediation server-side. Patch status is confirmed by the vendor stating the fix is in 3.7.0.
CVE-2026-54069: CWE-346: Origin Validation Error in siyuan-note siyuan
Description
SiYuan Note versions prior to 3.7.0 have an origin validation vulnerability in their kernel HTTP server. The server trusts all chrome-extension:// origins without authentication, granting RoleAdministrator access to any installed Chrome/Chromium extension. This allows extensions, including compromised ones, to make authenticated admin API calls to the local SiYuan kernel, potentially leading to data exfiltration, stored XSS injection, and configuration tampering. The vulnerability is fixed in version 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 describes an origin validation error (CWE-346) in SiYuan Note's kernel HTTP server before version 3.7.0. The server unconditionally trusts all chrome-extension:// origins, granting administrative privileges to every installed browser extension without requiring authentication. Because the default AccessAuthCode is empty on desktop installs, any Chrome or Chromium extension, including those compromised via supply chain attacks, can perform fully authenticated admin API calls to the SiYuan kernel at 127.0.0.1:6806. This enables attackers to exfiltrate data, inject stored cross-site scripting payloads, and tamper with configuration settings. The issue is resolved in SiYuan Note 3.7.0.
Potential Impact
Attackers controlling or compromising any Chrome/Chromium extension can gain administrative access to the SiYuan Note kernel HTTP server on the local machine. This access allows them to exfiltrate sensitive data, inject malicious scripts (stored XSS), and alter application configurations, potentially compromising the confidentiality, integrity, and availability of the user's data and application environment.
Mitigation Recommendations
This vulnerability is fixed in SiYuan Note version 3.7.0. Users should upgrade to version 3.7.0 or later to remediate the issue. No official patch or temporary fix is indicated beyond upgrading. Since this is a desktop application, the vendor does not manage remediation server-side. Patch status is confirmed by the vendor stating the fix is in 3.7.0.
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: 06/24/2026, 22:02:27 UTC
Last updated: 06/24/2026, 23:49:35 UTC
Views: 5
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.
External Links
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.