Magento 2.4.5 to 2.4.8 upgrade is a full infrastructure overhaul, not a routine patch

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E-commerce stores still running Magento 2.4.5 face a critical deadline: AWS RDS will end standard support for MySQL 8.0 on July 31, 2026, after which databases will be forcibly moved to a costly extended support tier. The upgrade to Magento 2.4.8 LTS is described as a leapfrog migration rather than a simple patch, requiring simultaneous shifts to PHP 8.4 and MariaDB 11.4 or MySQL 8.4. Six major architectural breaking points have been identified, including changes to database authentication, OpenSearch compatibility, and stricter PHP typing, any of which can bring down a production system if mishandled. MySQL 8.4 disables the legacy mysql_native_password plugin by default, meaning third-party tools using outdated database drivers may fail with connection errors unless users are migrated to caching_sha2_password beforehand. Continuing on the legacy stack also risks PCI-DSS 4.0 compliance violations, as running end-of-life runtimes and unpatched databases can expose merchants to loss of payment processing capabilities.

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