CVE-2026-31876
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 <iframe>. This vulnerability is fixed in 3.3.9.
- Affected products
- Notesnook, Notesnook Desktop, Notesnook Mobile
- Streetwriters Notesnook Desktop
- < 3.3.9
- Streetwriters Notesnook Mobile
- < 3.3.15
- Fix
- Available
- CVSS 3.1
- 5.4 MEDIUM
- EPSS
- 0.2% (7th percentile)
- Weakness
- CWE-79
- NVD status
- Analyzed
- Published
- 2026-03-11
CVE-2026-31876 at NVD
No indexed exploits for CVE-2026-31876 yet
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