CVE catalog
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 deskto
- Severity
- Critical · CVSS 9.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.72% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Cpe | notesnook_desktop | Not reported | 3.3.11 | fixed |
| Cpe | notesnook_mobile | Not reported | 3.3.17 | fixed |
| Cpe | notesnook_desktop | Not reported | 3.3.11 | fixed |
| Cpe | notesnook_mobile | Not reported | 3.3.17 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Cpe | notesnook_desktop | cpe | Not reported | 3.3.11 | Not reported | Not reported | Not reported |
| Cpe | notesnook_mobile | cpe | Not reported | 3.3.17 | Not reported | Not reported | Not reported |
| Cpe | notesnook_desktop | cpe | Not reported | 3.3.11 | Not reported | NVD-CVE-2026-33976 | Not reported |
| Cpe | notesnook_mobile | cpe | Not reported | 3.3.17 | Not reported | NVD-CVE-2026-33976 | Not reported |
OpenFactory catalog packages
No matching packages in this catalog.
Observed: