Visa ships a security AI that patches production code before any human reviews it

Summary

Visa released an open-source security tool that automatically finds vulnerabilities, writes fixes, and runs an adversarial panel on its own patch before any human review. The tool ships enabled by default, addressing the bottleneck where AI finds vulnerabilities faster than humans can fix them. The release follows a GhostJacking attack demonstration at DEF CON 34, sparking debate over AI agent autonomy.