siyuan-note SiYuan up to 3.7.0 HTML Renderer action/xlink:href HTML injection

Summaryinfo

A vulnerability marked as problematic has been reported in siyuan-note SiYuan up to 3.7.0. Affected by this issue is some unknown functionality of the component HTML Renderer. Performing a manipulation of the argument action/xlink:href results in HTML injection. This vulnerability is reported as CVE-2026-59833. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in siyuan-note SiYuan up to 3.7.0. It has been classified as problematic. This affects an unknown code of the component HTML Renderer. The manipulation of the argument action/xlink:href with an unknown input leads to a html injection 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. The summary by CVE is:

SiYuan is an open-source personal knowledge management system. Prior to 3.7.1, SiYuan renders note and package content to HTML through the Lute engine with sanitization enabled, but Lute's dangerous javascript scheme block does not check form action or SVG xlink:href attributes, allowing stored cross-site scripting in document export-preview and Bazaar package README render paths that can execute OS commands in the Electron desktop renderer. This issue is fixed in versions 3.7.1.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-59833 since 07/07/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

Upgrading to version 3.7.1 eliminates this vulnerability.

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Productinfo

Vendor

• siyuan-note

Name

• SiYuan

Version

• 3.0
• 3.1
• 3.2
• 3.3
• 3.4
• 3.5
• 3.6
• 3.7.0

Website

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

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