Upload of certain mime type buggy

[1manfactory]

I am using the following code to grand uploads for epub, pdf and mobi files inside my functions.php

<?php
function my_upload_mimes($mimes) {
        
        $mimes['epub'] = 'application/epub+zip';
        $mimes['mobi'] = 'application/octet-stream'; 
        $mimes['pdf'] = 'application/pdf';

    return $mimes;
}
add_filter('upload_mimes', 'my_upload_mimes');

It used to work until recently. All I get is the error message that I am not allowed to upload epub files.

Funny thing is that it only happens with some epub files.

It's not size related. I am having the same trouble on test and production environment.

It seems to me that the way the included mimetype file inside the zip container is handled wrong

Juergen

[Clorith]

Hi,

This is being tracked as part of #39550 where an added mime-check from 4.7.1 is behaving differently depending on your server setup.