PHP2Shell: a client-proof patch checklist for freelancers (CVE-2026-109618 / 109619)
How to check that a client's PHP really has the 21 Oct 2026 fix, what to look for since 17 Oct, and what to tell the client. Sources: CISA, Tenable, Amazon, Hostinger, php.net.
🎯 Vulnerability: Remote Code Execution (RCE)
💡 Defense Fix: Avoid executing shell commands via system(). Use parameterized APIs and strict input sanitization.