@Pablo-J-Rogina
Accidentally found needed code in QT sources. It returns all the cookies one by one.
QVariant hdr = rq.header(QNetworkRequest::CookieHeader);
QList<QNetworkCookie> cookies = qvariant_cast<QList<QNetworkCookie> >(hdr);
QList<QNetworkCookie>::ConstIterator it = cookies.begin(), end = cookies.end();
for ( ; it != end; ++it) {
qDebug() << it->name();
}