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Findings

CVE-2026-33976

Notesnook is a note-taking app.

Published Mar 27, 2026 · updated Jun 17, 2026 · streetwriters notesnook desktop

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 . Event-handler attributes such as , , or execute in the Notesnook origin. In the desktop app, this becomes RCE because Electron is configured with and . Version 3.3.11 Web/Desktop and 3.3.17 on Android/iOS patch the issue.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Mar 27, 2026 · NIST NVD

    Detected

    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 re

  2. Jun 17, 2026 · NIST NVD

    Updated

    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 re

Affected

  • cpe streetwriters/notesnook desktopversion unspecified
  • cpe streetwriters/notesnook mobileversion unspecified

Sources

  • CVE.orgVulnerability recordCVE-2026-33976

    Official CVE identifier

    cve.org
  • NIST NVDVulnerability recordCVE-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 attribut

    nvd.nist.gov

References

CVE-2026-33976 · ZeroDay Findings