CVE-2026-38967 identifies a critical vulnerability in CrowCpp Crow through version 1.3.1 where HTTP response header injection is possible via unvalidated response header values. This vulnerability corresponds to CWE-113 (Improper Neutralization of CRLF Sequences in HTTP Headers). It allows attackers to manipulate HTTP response headers, potentially leading to security issues such as HTTP response splitting or cache poisoning. The CVSS 3.1 score of 9.8 reflects network attack vector, low attack complexity, no privileges or user interaction required, and impacts confidentiality, integrity, and availability.

Successful exploitation can lead to injection of arbitrary HTTP headers, which may enable attacks like HTTP response splitting, web cache poisoning, or cross-site scripting via manipulated headers. The vulnerability affects confidentiality, integrity, and availability of the affected system. There are no known exploits in the wild at this time.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should avoid using affected versions or implement application-level validation of response headers if possible. Monitor for vendor updates to apply official patches promptly once released.