Vulnerability · Published May 16, 2026 · Assigned by VulnCheck
CVE-2021-47969Color Notes 1.4 Denial of Service via Long Character String
High 7.5
In plain English
A high-severity security flaw in Color Notes from color-notes. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 21% of all known vulnerabilities).
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.3%top 79.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
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 (as reported)
| Vendor | Product | Versions |
|---|---|---|
| color-notes | Color Notes | 1.4 |
Weakness: CWE-789 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
- ExploitDB-49952 exploit
- VulnCheck Advisory: Color Notes 1.4 Denial of Service via Long Character String third-party-advisory