package ee.tuleva.onboarding.config;

import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.method.configuration.EnableGlobalMethodSecurity;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.oauth2.config.annotation.web.configuration.EnableOAuth2Client;

@EnableWebSecurity
@EnableGlobalMethodSecurity(securedEnabled = true)
@EnableOAuth2Client
@Configuration
public class SecurityConfiguration extends WebSecurityConfigurerAdapter {

    @Override
    protected void configure(HttpSecurity http) throws Exception {

        http
        .anonymous().and()
                .authorizeRequests().regexMatchers("/v1/.*").authenticated()
                .regexMatchers("/").permitAll()
                .and()
                .csrf().ignoringAntMatchers("/v1/**", "/authenticate", "/authenticate/is-complete");

    }
}

package ee.tuleva.onboarding.config;

import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.method.configuration.EnableGlobalMethodSecurity;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.oauth2.config.annotation.web.configuration.EnableOAuth2Client;

@EnableWebSecurity
@EnableGlobalMethodSecurity(securedEnabled = true)
@EnableOAuth2Client
@Configuration
public class SecurityConfiguration extends WebSecurityConfigurerAdapter {

    @Override
    protected void configure(HttpSecurity http) throws Exception {

        http
        .anonymous().and()
                .authorizeRequests().regexMatchers("/v1/.*").authenticated()
                .regexMatchers("/").permitAll()
                .and()
                .csrf().ignoringAntMatchers("/v1/**", "/authenticate");

    }
}

Remove unnecessary ant matcher