In PHP 8.3.* before 8.3.5, function mbencodemimeheader() runs endlessly for some inputs that contain long strings of non-space characters followed by a space. This could lead to a potential DoS attack if a hostile user sends data to an application that uses this function.
{ "cpes": [ "cpe:2.3:a:php:php:*:*:*:*:*:*:*:*" ], "severity": "High" }