CVE-2026-33976 in streetwriters Notesnook

Zusammenfassung (Englisch)

Notesnook is a note-taking app. Prior to version 3.3.11 on Web/Desktop and 3.3.17 on Android/iOS, a stored XSS in the Web Clipper rendering flow can be escalated to remote code execution in the desktop app. The root cause is that the clipper preserves attacker-controlled attributes from the source page’s root element and stores them inside web-clip HTML. When the clip is later opened, Notesnook renders that HTML into a same-origin, unsandboxed iframe using `contentDocument.write(...)`. Event-handler attributes such as `onload`, `onclick`, or `onmouseover` execute in the Notesnook origin. In the desktop app, this becomes RCE because Electron is configured with `nodeIntegration: true` and `contextIsolation: false`. Version 3.3.11 Web/Desktop and 3.3.17 on Android/iOS patch the issue.

Zuständig

GitHub_M

Reservieren

24.03.2026

Veröffentlichung

28.03.2026

Einträge

VulDB provides additional information and datapoints for this CVE:

ID	Schwachstelle	CWE	Aus	Mas	CVE
354016	streetwriters Notesnook Web Clipper Rendering Flow Cross Site Scripting	79	Nicht definiert	Offizieller Fix	CVE-2026-33976