TriliumNext Trilium up to 0.102.1 clickjacking

Summaryinfo

A vulnerability was found in TriliumNext Trilium up to 0.102.1. It has been rated as problematic. This issue affects some unknown processing. This manipulation causes clickjacking. The identification of this vulnerability is CVE-2026-39309. It is possible to initiate the attack remotely. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability has been found in TriliumNext Trilium up to 0.102.1 and classified as problematic. Affected by this vulnerability is an unknown function. The manipulation with an unknown input leads to a clickjacking vulnerability. The CWE definition for the vulnerability is CWE-451. The user interface (UI) does not properly represent critical information to the user, allowing the information - or its source - to be obscured or spoofed. This is often a component in phishing attacks. As an impact it is known to affect integrity. The summary by CVE is:

Trilium Notes is a cross-platform, hierarchical note taking application focused on building large personal knowledge bases. In versions 0.102.1 and prior, the Electron configuration is vulnerable to TCC Bypass via Prompt Spoofing, allowing local attackers to trigger misleading macOS permission prompts by running malicious code under the identity of the trusted app. The root cause is that the RunAsNode fuse allows launching the app in a special Node.js mode using -e to execute arbitrary system commands with Trilium Notes's permissions and identity. An attacker can leverage this through a subprocess to request any sensitive permissions, such as access to hardware (camera, microphone) and TCC-protected files, causing the TCC system prompt to appear as if the request came from Trilium rather than the attacker's code, because macOS treats the subprocess as part of the parent application. Exploitation allows access to TCC-protected resources like the screen, camera, microphone, and folders such as ~/Documents and ~/Downloads, undermining macOS's security model and UI integrity through social engineering. This issue has been fixed in version 0.102.2.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-39309 since 04/06/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1566.003 according to MITRE ATT&CK.

Upgrading to version 0.102.2 eliminates this vulnerability. The upgrade is hosted for download at github.com.

The vulnerability is also documented in the vulnerability database at CNNVD (CNNVD-202605-4472). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

• TriliumNext

Name

• Trilium

Version

• 0.102.0
• 0.102.1

Website

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

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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