---
id: CVE-2026-39310
title: >-
  Trilium Notes is a cross-platform, hierarchical note taking application
  focused on building large personal knowledge bases
summary: >-
  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 Clipper API in Trilium Desktop (v0.101.3) allows full
  authentication bypass wh…
severity: high
cvss: 8.6
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L'
cwe:
  - CWE-284
  - CWE-306
published: '2026-05-20'
updated: '2026-07-23'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-39310'
references:
  - url: 'https://github.com/TriliumNext/Trilium/releases/tag/v0.102.2'
    label: security-advisories@github.com
  - url: >-
      https://github.com/TriliumNext/Trilium/security/advisories/GHSA-jcvx-vc83-cppw
    label: security-advisories@github.com
  - url: >-
      https://github.com/TriliumNext/Trilium/security/advisories/GHSA-jcvx-vc83-cppw
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
epss: 0.00502
epssPercentile: 0.40421
ingestedAt: '2026-07-23T18:19:07.567Z'
---

## Overview

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 Clipper API in Trilium Desktop (v0.101.3) allows full authentication bypass when running in an Electron environment. When Trilium detects an Electron environment, it explicitly disables authentication middleware for the Clipper API, exposing endpoints such as /api/clipper/notes to the network with no password, API token, or CSRF protection. An attacker on a shared network (for example, a corporate LAN or public Wi-Fi) can scan for open high-range ports using a tool like nmap, since Trilium often binds to ports such as 37840. Once a candidate port is found, an unauthenticated request to the Clipper handshake endpoint, which also bypasses authentication, confirms a Trilium instance by returning the application name and protocol version. This facilitates unauthorized data access, phishing, and local system compromise. The issue has been fixed in version 0.102.2.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.