Validator failed to recognize file by mime

[susilon]

When I uploaded the .exe file that I renamed the extension to .pdf, validation failed to recognize the .exe file and thought the file was a .pdf file

'Uploader.FileValidation' => array(
'file' => array(
'extension' => array('pdf'),
'type' => 'application',
'mimeType' => array('application/pdf'),
'required' => true
)
),

my solution was added mime checking using finfo_open at AbstractValidator -> mimeType

public function mimeType($whitelist = array()) {
$finfo = finfo_open(FILEINFO_MIME_TYPE);
$mime = finfo_file($finfo, $this->getFile());
return in_array($mime, (array) $whitelist);
}