No Halloween costume? Just be a deceptively cute AI agent icon, a PHP vulnerability, or sleepy time Bryan Johnson. Get your pass savings & deals before it starts. Image Credits:Vuk Saric / Getty Images Media & Entertainment Last-minute Halloween costumes for tech nerds Amanda Silberling 2:26 PM PDT · October 30, 2026 It happens to the best of us — you’ve completely dropped the ball on figuring out a Halloween costume.