Coder Trainee

Apr 8, 2026 · Backend Development

How to Fix CORS Issues After Upgrading to Spring Boot 2.5.x

Upgrading a Spring Boot application from 2.1.8 to 2.5.6 can break existing CORS configurations, but adding a WebMvcConfigurer bean with allowedOriginPatterns resolves the new cross‑origin restrictions, as demonstrated with concrete code examples.