📄 PHP 8.5.7 mb_substr() Underflow

PHP version 8.5.7 suffers an underflow condition that can be exploited to trigger a denial of service condition. PHP 8.5.7 mbsubstr 'SJIS-mac' sizet underflow Author: Khashayar Fereidani Disclosure Date: 2026-06-18 Advisory: https://fereidani.com/php-857-mbsubstr-sjis-mac-sizet-underflow Contact:...