Zend Framework < 2.3.8 / 2.4.x < 2.4.1 HTTP Response Splitting

Versions of Zend Framework earlier than 2.3.8, or 2.4.x earlier than 2.4.1 are vulnerable to a flaw in the ‘Zend\Mail’ and ‘Zend\Http’ components that is triggered as CRLF (Carriage Return and Line Feed) character sequences are not properly sanitized before being included in responses. This allows a context-dependent attacker to inject additional headers into responses to conduct HTTP response splitting attacks.