CVE-2026-33976

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 sourc...

CVE-2026-33976

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 sourc...

CVE-2026-33976

Notesnook stores attacker-controlled attributes from a source page into web-clip HTML during Web Clipper rendering. When a clip is later opened, Notesnook renders this HTML in a same-origin, unsandboxed iframe via contentDocument.write, allowing event-handler attributes (onload, onclick, onmouseo...

CVE-2026-33976 Notesnook vulnerable to RCE via stored XSS in Web Clipper rendering

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 sourc...

CVE-2026-33976 Notesnook vulnerable to RCE via stored XSS in Web Clipper rendering

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 sourc...