siyuan-note SiYuan up to 3.7.1 Protocol app/src/layout/Tab.ts innerHTML icon cross site scripting

Summaryinfo

A vulnerability, which was classified as problematic, was found in siyuan-note SiYuan up to 3.7.1. This affects the function innerHTML of the file app/src/layout/Tab.ts of the component Protocol Handler. The manipulation of the argument icon results in cross site scripting. This vulnerability is identified as CVE-2026-65606. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability, which was classified as problematic, was found in siyuan-note SiYuan up to 3.7.1. Affected is the function innerHTML of the file app/src/layout/Tab.ts of the component Protocol Handler. The manipulation of the argument icon with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity. CVE summarizes:

SiYuan before v3.7.2 contains a cross-site scripting vulnerability in the siyuan:// protocol handler. When a siyuan://plugins/<name> link references a name that is not an installed plugin, the application opens a custom tab and inserts the link's icon parameter into the tab header via innerHTML without escaping it (app/src/layout/Tab.ts), allowing injection of an <img onerror=...> element. Because the SiYuan Desktop renderer runs with nodeIntegration:true, the injected JavaScript can access Node's require and call require('child_process').execSync(...), escalating the cross-site scripting into arbitrary operating-system command execution.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-65606 since 07/22/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1059.007 by the MITRE ATT&CK project.

Upgrading to version 3.7.2 eliminates this vulnerability.

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Productinfo

Vendor

• siyuan-note

Name

• SiYuan

Version

• 3.7.0
• 3.7.1

Website

• Product: https://github.com/siyuan-note/siyuan/

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