CVE-2026-33955
Notesnook vulnerable to RCE via stored XSS in Note History diff viewer
CVSS Score
8.6
EPSS Score
0.1%
EPSS Percentile
16th
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.
| CWE | CWE-79 CWE-94 |
| Vendor | streetwriters |
| Product | notesnook web/desktop |
| Published | Mar 27, 2026 |
| Last Updated | Apr 3, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
streetwriters / Notesnook Web/Desktop
< 3.3.11