Security is not a phase you pass through on the way to production. It is a permanent condition.

On April 29, 2026, a security research team published a vulnerability that works on every Linux distribution shipped since 2017. Not most. Every. The exploit is a single Python script. It is 732 bytes long. It requires no race conditions, no kernel-specific offsets, no special privileges beyond a local user account. One script, every distro, every time. They called it Copy Fail [1].