TriliumNext Trilium up to 0.103.0 Mind Map Import dangerouslySetInnerHTML cross site scripting

Summaryinfo

A vulnerability classified as problematic has been found in TriliumNext Trilium up to 0.103.0. This impacts the function dangerouslySetInnerHTML of the component Mind Map Import. Performing a manipulation results in cross site scripting. This vulnerability is cataloged as CVE-2026-53578. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in TriliumNext Trilium up to 0.103.0. It has been classified as problematic. This affects the function dangerouslySetInnerHTML of the component Mind Map Import. The manipulation 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. The summary by CVE is:

Trilium is an open-source hierarchical note-taking application. In versions up to and including 0.103.0, the default-on "Safe import" filter sanitizes HTML only for text notes and excludes the mindMap note type, whose JSON content is stored without sanitization, allowing an attacker-supplied import archive to embed a payload that renders as arbitrary HTML. A mind map node can carry a dangerouslySetInnerHTML property that the Mind Elixir library assigns directly to a node's innerHTML, so a malicious note survives Safe import and executes script as soon as the victim opens the imported mind map. On the desktop client the Electron renderer runs with Node integration enabled, so the injected JavaScript escalates from cross-site scripting to full remote code execution on the victim's machine. This issue is fixed in version 0.104.0.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-53578 since 06/09/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. 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 0.104.0 eliminates this vulnerability.

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Productinfo

Vendor

• TriliumNext

Name

• Trilium

Version

• 0.103

Website

• Product: https://github.com/TriliumNext/Trilium/

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