Categories
CVE-2026-31876

Notesnook has Stored XSS via unsanitized Twitter/X embed URL in editor (`tweetToEmbed`)

Summary

Notesnook has Stored XSS via unsanitized Twitter/X embed URL in editor (tweetToEmbed)

Original description

The description as published by the source.

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.

Source: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV

References

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