PCI DSS 4.0.1: Application Requirements You’re Being Assessed On in 2026
Key Takeaways Since March 31, 2025, all 51 former “best practice” requirements in PCI DSS 4.0 have been fully scored. Every 2026 assessment covers them. A large share of the new weight sits in the PCI DSS 4.0.1 application requirements, concentrated in Requirements 6 and 11: inventory of custom applications and APIs, continuous protection of […]
🎯 Vulnerability: Web Security Vulnerability
💡 Defense Fix: Implement strict input validation, contextual output encoding, and enforce least-privilege authorization controls.