BIT-LIBPHP-2020-7070 PHP parses encoded cookie names so malicious `__Host-` cookies can be sent

In PHP versions 7.2.x below 7.2.34, 7.3.x below 7.3.23 and 7.4.x below 7.4.11, when PHP is processing incoming HTTP cookie values, the cookie names are url-decoded. This may lead to cookies with prefixes like Host confused with cookies that decode to such prefix, thus leading to an attacker being...