This version is still in development and is not considered stable yet. For the latest stable version, please use Spring Security 6.4.2!

CORS

Spring Framework provides first class support for CORS. CORS must be processed before Spring Security because the pre-flight request will not contain any cookies (i.e. the JSESSIONID). If the request does not contain any cookies and Spring Security is first, the request will determine the user is not authenticated (since there are no cookies in the request) and reject it.

The easiest way to ensure that CORS is handled first is to use the CorsFilter. Users can integrate the CorsFilter with Spring Security by providing a CorsConfigurationSource using the following:

Java
Kotlin

@EnableWebSecurity
public class WebSecurityConfig {

	@Bean
	public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
		http
			// by default uses a Bean by the name of corsConfigurationSource
			.cors(withDefaults())
			...
		return http.build();
	}

	@Bean
	CorsConfigurationSource corsConfigurationSource() {
		CorsConfiguration configuration = new CorsConfiguration();
		configuration.setAllowedOrigins(Arrays.asList("https://example.com"));
		configuration.setAllowedMethods(Arrays.asList("GET","POST"));
		UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
		source.registerCorsConfiguration("/**", configuration);
		return source;
	}
}

@EnableWebSecurity
open class WebSecurityConfig {
    @Bean
    open fun filterChain(http: HttpSecurity): SecurityFilterChain {
        http {
            // by default uses a Bean by the name of corsConfigurationSource
            cors { }
            // ...
        }
        return http.build()
    }

    @Bean
    open fun corsConfigurationSource(): CorsConfigurationSource {
        val configuration = CorsConfiguration()
        configuration.allowedOrigins = listOf("https://example.com")
        configuration.allowedMethods = listOf("GET", "POST")
        val source = UrlBasedCorsConfigurationSource()
        source.registerCorsConfiguration("/**", configuration)
        return source
    }
}

or in XML

<http>
	<cors configuration-source-ref="corsSource"/>
	...
</http>
<b:bean id="corsSource" class="org.springframework.web.cors.UrlBasedCorsConfigurationSource">
	...
</b:bean>

If you are using Spring MVC’s CORS support, you can omit specifying the CorsConfigurationSource and Spring Security will leverage the CORS configuration provided to Spring MVC.

Java
Kotlin

@EnableWebSecurity
public class WebSecurityConfig {

	@Bean
	public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
		http
			// if Spring MVC is on classpath and no CorsConfigurationSource is provided,
			// Spring Security will use CORS configuration provided to Spring MVC
			.cors(withDefaults())
			...
		return http.build();
	}
}

@EnableWebSecurity
open class WebSecurityConfig {
    @Bean
    open fun filterChain(http: HttpSecurity): SecurityFilterChain {
        http {
            // if Spring MVC is on classpath and no CorsConfigurationSource is provided,
            // Spring Security will use CORS configuration provided to Spring MVC
            cors { }
            // ...
        }
        return http.build()
    }
}

or in XML

<http>
	<!-- Default to Spring MVC's CORS configuration -->
	<cors />
	...
</http>