Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Streetwriters | Notesnook Desktop | < 3.3.11 |
Related Weaknesses (CWE)
References
- https://github.com/streetwriters/notesnook/security/advisories/GHSA-45g3-cv93-q5ExploitVendor Advisory
FAQ
What is CVE-2026-33955?
CVE-2026-33955 is a vulnerability with a CVSS score of 8.6 (HIGH). 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 des...
How severe is CVE-2026-33955?
CVE-2026-33955 has been rated HIGH with a CVSS base score of 8.6/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-33955?
Check the references section above for vendor advisories and patch information. Affected products include: Streetwriters Notesnook Desktop.