OWASP Coreruleset
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By the Year
In 2026 there have been 0 vulnerabilities in OWASP Coreruleset. Coreruleset did not have any published security vulnerabilities last year.
| Year | Vulnerabilities | Average Score |
|---|---|---|
| 2026 | 0 | 0.00 |
| 2025 | 0 | 0.00 |
| 2024 | 0 | 0.00 |
| 2023 | 1 | 9.80 |
It may take a day or so for new Coreruleset vulnerabilities to show up in the stats or in the list of recent security vulnerabilities. Additionally vulnerabilities may be tagged under a different product or component name.
Recent OWASP Coreruleset Security Vulnerabilities
OWASP ModSecurity CRS <=3.3.4: Content-Type header confusion WAF bypass
CVE-2023-38199
9.8 - Critical
- July 13, 2023
coreruleset (aka OWASP ModSecurity Core Rule Set) through 3.3.4 does not detect multiple Content-Type request headers on some platforms. This might allow attackers to bypass a WAF with a crafted payload, aka "Content-Type confusion" between the WAF and the backend application. This occurs when the web application relies on only the last Content-Type header. Other platforms may reject the additional Content-Type header or merge conflicting headers, leading to detection as a malformed header.
Object Type Confusion
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