VULNERABILITY INTELLIGENCE

CVE-2026-33955

CVSS score8.6 HIGH
EPSS probability0.35%
CISA KEVNot currently listed
Published2026-03-27
Last modified2026-10-25
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Description

Notesnook is a note-taking app. Prior to version 3.3.11 on Web/Desktop, a cross-site scripting vulnerability stored in the note history comparison viewer can escalate to remote code execution in a desktop application. The issue is triggered when an attacker-controlled note header is displayed using `dangerouslySetInnerHTML` without secure handling. When combined with the full backup and restore feature in the desktop application, this becomes remote code execution because Electron is configured with `nodeIntegration: true` and `contextIsolation: false`. Version 3.3.11 patches the issue.

Weakness classification

  • security-advisories@github.com: CWE-79

Primary references