CVE-2021-47969: Color-Notes Color Notes

High severity, CVSS 7.5. EPSS: 0.3% chance of exploitation in the next 30 days.

Color Notes 1.4 contains a denial of service vulnerability that allows attackers to crash the application by pasting excessively long character strings into note fields. Attackers can generate a payload containing 350,000 repeated characters and paste it twice into a new note to cause the application to stop responding.

Affected products

Published 2026-05-16. Last modified 2026-06-17.