php: URL decoding of cookie names can lead to different interpretation of cookies between browser and server

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...