Is CVE-2023-38199 actively exploited?

No active exploitation of CVE-2023-38199 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2023-38199 be exploited remotely?

Yes. CVE-2023-38199 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2023-38199?

CVE-2023-38199 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2023-38199

CWE-843Published: July 13, 2023· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

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.

NVD Source

Technical Analysis

CVE-2023-38199 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.