CVE-2023-38199

https://notcve.org/view.php?id=CVE-2023-38199

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. • https://github.com/coreruleset/coreruleset/issues/3191 https://github.com/coreruleset/coreruleset/pull/3237 • CWE-843: Access of Resource Using Incompatible Type ('Type Confusion') •