CVE-2026-31876

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CVSS 3.1

5.4 medium

EPSS

<1%p7

Published

Mar 11, 2026 (Mar 11, 2026)

Modified

Jun 17, 2026

Description

Notesnook is a note-taking app focused on user privacy & ease of use. Prior to 3.3.9, a Stored Cross-Site Scripting (XSS) vulnerability existed in Notesnook's editor embed component when rendering Twitter/X embed URLs. The tweetToEmbed() function in component.tsx interpolated the user-supplied URL directly into an HTML string without escaping, which was then assigned to the srcdoc attribute of an . This vulnerability is fixed in 3.3.9.

Vendors: streetwriters
Products: notesnook desktop, notesnook mobile
Weakness: CWE-79
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

NVD CVE.org GitHub PoCs EPSS (0.2%)

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