TriliumNext Trilium up to 0.103.x Safe Import Filter ejs.render code injection

Summaryinfo

A vulnerability categorized as critical has been discovered in TriliumNext Trilium up to 0.103.x. This issue affects the function ejs.render of the component Safe Import Filter. Executing a manipulation can lead to code injection. The identification of this vulnerability is CVE-2026-47727. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability classified as critical was found in TriliumNext Trilium up to 0.103.x. This vulnerability affects the function ejs.render of the component Safe Import Filter. The manipulation with an unknown input leads to a code injection vulnerability. The CWE definition for the vulnerability is CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Trilium is an open-source hierarchical note-taking application. In versions prior to 0.104.0, the default-on "Safe import" filter fails to neutralize the shareTemplate relation because that relation is not marked as dangerous, allowing an attacker-supplied import archive to plant a server-side template that leads to remote code execution. The relation is omitted from the built-in list of dangerous attributes, so unlike other code-loading relations it is not disabled on import, and when the victim later publishes the imported note the public share renderer feeds the linked EJS code note's raw bytes into ejs.render, which compiles them in the server's Node process. An unauthenticated request to the shared note then executes the attacker's JavaScript with full access to require, process, the filesystem, and the network. This issue is fixed in version 0.104.0.

The advisory is available at github.com. This vulnerability was named CVE-2026-47727 since 05/19/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1059 by the MITRE ATT&CK project.

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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