For the latest stable version, please use Spring Boot 3.4.1!

Spring Security

If Spring Security is on the classpath, then web applications are secured by default. Spring Boot relies on Spring Security’s content-negotiation strategy to determine whether to use httpBasic or formLogin. To add method-level security to a web application, you can also add @EnableMethodSecurity with your desired settings. Additional information can be found in the Spring Security Reference Guide.

The default UserDetailsService has a single user. The user name is user, and the password is random and is printed at WARN level when the application starts, as shown in the following example:

Using generated security password: 78fa095d-3f4c-48b1-ad50-e24c31d5cf35

This generated password is for development use only. Your security configuration must be updated before running your application in production.

If you fine-tune your logging configuration, ensure that the org.springframework.boot.autoconfigure.security category is set to log WARN-level messages. Otherwise, the default password is not printed.

You can change the username and password by providing a spring.security.user.name and spring.security.user.password.

The basic features you get by default in a web application are:

A UserDetailsService (or ReactiveUserDetailsService in case of a WebFlux application) bean with in-memory store and a single user with a generated password (see SecurityProperties.User for the properties of the user).
Form-based login or HTTP Basic security (depending on the Accept header in the request) for the entire application (including actuator endpoints if actuator is on the classpath).
A DefaultAuthenticationEventPublisher for publishing authentication events.

You can provide a different AuthenticationEventPublisher by adding a bean for it.

MVC Security

The default security configuration is implemented in SecurityAutoConfiguration and UserDetailsServiceAutoConfiguration. SecurityAutoConfiguration imports SpringBootWebSecurityConfiguration for web security and UserDetailsServiceAutoConfiguration configures authentication, which is also relevant in non-web applications.

To completely switch off the default web application security configuration, including Actuator security, or to combine multiple Spring Security components such as OAuth2 Client and Resource Server, add a bean of type SecurityFilterChain (doing so does not disable the UserDetailsService configuration). To also switch off the UserDetailsService configuration, add a bean of type UserDetailsService, AuthenticationProvider, or AuthenticationManager.

The auto-configuration of a UserDetailsService will also back off any of the following Spring Security modules is on the classpath:

spring-security-oauth2-client
spring-security-oauth2-resource-server
spring-security-saml2-service-provider

To use UserDetailsService in addition to one or more of these dependencies, define your own InMemoryUserDetailsManager bean.

Access rules can be overridden by adding a custom SecurityFilterChain bean. Spring Boot provides convenience methods that can be used to override access rules for actuator endpoints and static resources. EndpointRequest can be used to create a RequestMatcher that is based on the management.endpoints.web.base-path property. PathRequest can be used to create a RequestMatcher for resources in commonly used locations.

WebFlux Security

Similar to Spring MVC applications, you can secure your WebFlux applications by adding the spring-boot-starter-security dependency. The default security configuration is implemented in ReactiveSecurityAutoConfiguration and UserDetailsServiceAutoConfiguration. ReactiveSecurityAutoConfiguration imports WebFluxSecurityConfiguration for web security and UserDetailsServiceAutoConfiguration configures authentication, which is also relevant in non-web applications.

To completely switch off the default web application security configuration, including Actuator security, add a bean of type WebFilterChainProxy (doing so does not disable the UserDetailsService configuration). To also switch off the UserDetailsService configuration, add a bean of type ReactiveUserDetailsService or ReactiveAuthenticationManager.

The auto-configuration will also back off when any of the following Spring Security modules is on the classpath:

spring-security-oauth2-client
spring-security-oauth2-resource-server

To use ReactiveUserDetailsService in addition to one or more of these dependencies, define your own MapReactiveUserDetailsService bean.

Access rules and the use of multiple Spring Security components such as OAuth 2 Client and Resource Server can be configured by adding a custom SecurityWebFilterChain bean. Spring Boot provides convenience methods that can be used to override access rules for actuator endpoints and static resources. EndpointRequest can be used to create a ServerWebExchangeMatcher that is based on the management.endpoints.web.base-path property.

PathRequest can be used to create a ServerWebExchangeMatcher for resources in commonly used locations.

For example, you can customize your security configuration by adding something like:

Java
Kotlin

import org.springframework.boot.autoconfigure.security.reactive.PathRequest;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.web.server.ServerHttpSecurity;
import org.springframework.security.web.server.SecurityWebFilterChain;

import static org.springframework.security.config.Customizer.withDefaults;

@Configuration(proxyBeanMethods = false)
public class MyWebFluxSecurityConfiguration {

	@Bean
	public SecurityWebFilterChain springSecurityFilterChain(ServerHttpSecurity http) {
		http.authorizeExchange((exchange) -> {
			exchange.matchers(PathRequest.toStaticResources().atCommonLocations()).permitAll();
			exchange.pathMatchers("/foo", "/bar").authenticated();
		});
		http.formLogin(withDefaults());
		return http.build();
	}

}

import org.springframework.boot.autoconfigure.security.reactive.PathRequest
import org.springframework.context.annotation.Bean
import org.springframework.context.annotation.Configuration
import org.springframework.security.config.Customizer.withDefaults
import org.springframework.security.config.web.server.ServerHttpSecurity
import org.springframework.security.web.server.SecurityWebFilterChain

@Configuration(proxyBeanMethods = false)
class MyWebFluxSecurityConfiguration {

	@Bean
	fun springSecurityFilterChain(http: ServerHttpSecurity): SecurityWebFilterChain {
		http.authorizeExchange { spec ->
			spec.matchers(PathRequest.toStaticResources().atCommonLocations()).permitAll()
			spec.pathMatchers("/foo", "/bar").authenticated()
		}
		http.formLogin(withDefaults())
		return http.build()
	}

}

OAuth2

OAuth2 is a widely used authorization framework that is supported by Spring.

Client

If you have spring-security-oauth2-client on your classpath, you can take advantage of some auto-configuration to set up OAuth2/Open ID Connect clients. This configuration makes use of the properties under OAuth2ClientProperties. The same properties are applicable to both servlet and reactive applications.

You can register multiple OAuth2 clients and providers under the spring.security.oauth2.client prefix, as shown in the following example:

Properties
YAML

spring.security.oauth2.client.registration.my-login-client.client-id=abcd
spring.security.oauth2.client.registration.my-login-client.client-secret=password
spring.security.oauth2.client.registration.my-login-client.client-name=Client for OpenID Connect
spring.security.oauth2.client.registration.my-login-client.provider=my-oauth-provider
spring.security.oauth2.client.registration.my-login-client.scope=openid,profile,email,phone,address
spring.security.oauth2.client.registration.my-login-client.redirect-uri={baseUrl}/login/oauth2/code/{registrationId}
spring.security.oauth2.client.registration.my-login-client.client-authentication-method=client_secret_basic
spring.security.oauth2.client.registration.my-login-client.authorization-grant-type=authorization_code
spring.security.oauth2.client.registration.my-client-1.client-id=abcd
spring.security.oauth2.client.registration.my-client-1.client-secret=password
spring.security.oauth2.client.registration.my-client-1.client-name=Client for user scope
spring.security.oauth2.client.registration.my-client-1.provider=my-oauth-provider
spring.security.oauth2.client.registration.my-client-1.scope=user
spring.security.oauth2.client.registration.my-client-1.redirect-uri={baseUrl}/authorized/user
spring.security.oauth2.client.registration.my-client-1.client-authentication-method=client_secret_basic
spring.security.oauth2.client.registration.my-client-1.authorization-grant-type=authorization_code
spring.security.oauth2.client.registration.my-client-2.client-id=abcd
spring.security.oauth2.client.registration.my-client-2.client-secret=password
spring.security.oauth2.client.registration.my-client-2.client-name=Client for email scope
spring.security.oauth2.client.registration.my-client-2.provider=my-oauth-provider
spring.security.oauth2.client.registration.my-client-2.scope=email
spring.security.oauth2.client.registration.my-client-2.redirect-uri={baseUrl}/authorized/email
spring.security.oauth2.client.registration.my-client-2.client-authentication-method=client_secret_basic
spring.security.oauth2.client.registration.my-client-2.authorization-grant-type=authorization_code
spring.security.oauth2.client.provider.my-oauth-provider.authorization-uri=https://my-auth-server.com/oauth2/authorize
spring.security.oauth2.client.provider.my-oauth-provider.token-uri=https://my-auth-server.com/oauth2/token
spring.security.oauth2.client.provider.my-oauth-provider.user-info-uri=https://my-auth-server.com/userinfo
spring.security.oauth2.client.provider.my-oauth-provider.user-info-authentication-method=header
spring.security.oauth2.client.provider.my-oauth-provider.jwk-set-uri=https://my-auth-server.com/oauth2/jwks
spring.security.oauth2.client.provider.my-oauth-provider.user-name-attribute=name

spring:
  security:
    oauth2:
      client:
        registration:
          my-login-client:
            client-id: "abcd"
            client-secret: "password"
            client-name: "Client for OpenID Connect"
            provider: "my-oauth-provider"
            scope: "openid,profile,email,phone,address"
            redirect-uri: "{baseUrl}/login/oauth2/code/{registrationId}"
            client-authentication-method: "client_secret_basic"
            authorization-grant-type: "authorization_code"

          my-client-1:
            client-id: "abcd"
            client-secret: "password"
            client-name: "Client for user scope"
            provider: "my-oauth-provider"
            scope: "user"
            redirect-uri: "{baseUrl}/authorized/user"
            client-authentication-method: "client_secret_basic"
            authorization-grant-type: "authorization_code"

          my-client-2:
            client-id: "abcd"
            client-secret: "password"
            client-name: "Client for email scope"
            provider: "my-oauth-provider"
            scope: "email"
            redirect-uri: "{baseUrl}/authorized/email"
            client-authentication-method: "client_secret_basic"
            authorization-grant-type: "authorization_code"

        provider:
          my-oauth-provider:
            authorization-uri: "https://my-auth-server.com/oauth2/authorize"
            token-uri: "https://my-auth-server.com/oauth2/token"
            user-info-uri: "https://my-auth-server.com/userinfo"
            user-info-authentication-method: "header"
            jwk-set-uri: "https://my-auth-server.com/oauth2/jwks"
            user-name-attribute: "name"

For OpenID Connect providers that support OpenID Connect discovery, the configuration can be further simplified. The provider needs to be configured with an issuer-uri which is the URI that it asserts as its Issuer Identifier. For example, if the issuer-uri provided is "https://example.com", then an "OpenID Provider Configuration Request" will be made to "https://example.com/.well-known/openid-configuration". The result is expected to be an "OpenID Provider Configuration Response". The following example shows how an OpenID Connect Provider can be configured with the issuer-uri:

Properties
YAML

spring.security.oauth2.client.provider.oidc-provider.issuer-uri=https://dev-123456.oktapreview.com/oauth2/default/

spring:
  security:
    oauth2:
      client:
        provider:
          oidc-provider:
            issuer-uri: "https://dev-123456.oktapreview.com/oauth2/default/"

By default, Spring Security’s OAuth2LoginAuthenticationFilter only processes URLs matching /login/oauth2/code/*. If you want to customize the redirect-uri to use a different pattern, you need to provide configuration to process that custom pattern. For example, for servlet applications, you can add your own SecurityFilterChain that resembles the following:

Java
Kotlin

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.web.SecurityFilterChain;

@Configuration(proxyBeanMethods = false)
@EnableWebSecurity
public class MyOAuthClientConfiguration {

	@Bean
	public SecurityFilterChain securityFilterChain(HttpSecurity http) throws Exception {
		http
			.authorizeHttpRequests((requests) -> requests
				.anyRequest().authenticated()
			)
			.oauth2Login((login) -> login
				.redirectionEndpoint((endpoint) -> endpoint
					.baseUri("/login/oauth2/callback/*")
				)
			);
		return http.build();
	}

}

import org.springframework.context.annotation.Bean
import org.springframework.context.annotation.Configuration
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.invoke
import org.springframework.security.web.SecurityFilterChain

@Configuration(proxyBeanMethods = false)
@EnableWebSecurity
open class MyOAuthClientConfiguration {

	@Bean
	open fun securityFilterChain(http: HttpSecurity): SecurityFilterChain {
		http {
			authorizeHttpRequests {
				authorize(anyRequest, authenticated)
			}
			oauth2Login {
				redirectionEndpoint {
					baseUri = "/login/oauth2/callback/*"
				}
			}
		}
		return http.build()
	}

}

Spring Boot auto-configures an InMemoryOAuth2AuthorizedClientService which is used by Spring Security for the management of client registrations. The InMemoryOAuth2AuthorizedClientService has limited capabilities and we recommend using it only for development environments. For production environments, consider using a JdbcOAuth2AuthorizedClientService or creating your own implementation of OAuth2AuthorizedClientService.

OAuth2 Client Registration for Common Providers

For common OAuth2 and OpenID providers, including Google, Github, Facebook, and Okta, we provide a set of provider defaults (google, github, facebook, and okta, respectively).

If you do not need to customize these providers, you can set the provider attribute to the one for which you need to infer defaults. Also, if the key for the client registration matches a default supported provider, Spring Boot infers that as well.

In other words, the two configurations in the following example use the Google provider:

Properties
YAML

spring.security.oauth2.client.registration.my-client.client-id=abcd
spring.security.oauth2.client.registration.my-client.client-secret=password
spring.security.oauth2.client.registration.my-client.provider=google
spring.security.oauth2.client.registration.google.client-id=abcd
spring.security.oauth2.client.registration.google.client-secret=password

spring:
  security:
    oauth2:
      client:
        registration:
          my-client:
            client-id: "abcd"
            client-secret: "password"
            provider: "google"
          google:
            client-id: "abcd"
            client-secret: "password"

Resource Server

If you have spring-security-oauth2-resource-server on your classpath, Spring Boot can set up an OAuth2 Resource Server. For JWT configuration, a JWK Set URI or OIDC Issuer URI needs to be specified, as shown in the following examples:

Properties
YAML

spring.security.oauth2.resourceserver.jwt.jwk-set-uri=https://example.com/oauth2/default/v1/keys

spring:
  security:
    oauth2:
      resourceserver:
        jwt:
          jwk-set-uri: "https://example.com/oauth2/default/v1/keys"

Properties
YAML

spring.security.oauth2.resourceserver.jwt.issuer-uri=https://dev-123456.oktapreview.com/oauth2/default/

spring:
  security:
    oauth2:
      resourceserver:
        jwt:
          issuer-uri: "https://dev-123456.oktapreview.com/oauth2/default/"

If the authorization server does not support a JWK Set URI, you can configure the resource server with the Public Key used for verifying the signature of the JWT. This can be done using the spring.security.oauth2.resourceserver.jwt.public-key-location property, where the value needs to point to a file containing the public key in the PEM-encoded x509 format.

The spring.security.oauth2.resourceserver.jwt.audiences property can be used to specify the expected values of the aud claim in JWTs. For example, to require JWTs to contain an aud claim with the value my-audience:

Properties
YAML

spring.security.oauth2.resourceserver.jwt.audiences[0]=my-audience

spring:
  security:
    oauth2:
      resourceserver:
        jwt:
          audiences:
            - "my-audience"

The same properties are applicable for both servlet and reactive applications. Alternatively, you can define your own JwtDecoder bean for servlet applications or a ReactiveJwtDecoder for reactive applications.

In cases where opaque tokens are used instead of JWTs, you can configure the following properties to validate tokens through introspection:

Properties
YAML

spring.security.oauth2.resourceserver.opaquetoken.introspection-uri=https://example.com/check-token
spring.security.oauth2.resourceserver.opaquetoken.client-id=my-client-id
spring.security.oauth2.resourceserver.opaquetoken.client-secret=my-client-secret

spring:
  security:
    oauth2:
      resourceserver:
        opaquetoken:
          introspection-uri: "https://example.com/check-token"
          client-id: "my-client-id"
          client-secret: "my-client-secret"

Again, the same properties are applicable for both servlet and reactive applications. Alternatively, you can define your own OpaqueTokenIntrospector bean for servlet applications or a ReactiveOpaqueTokenIntrospector for reactive applications.

Authorization Server

If you have spring-security-oauth2-authorization-server on your classpath, you can take advantage of some auto-configuration to set up a Servlet-based OAuth2 Authorization Server.

You can register multiple OAuth2 clients under the spring.security.oauth2.authorizationserver.client prefix, as shown in the following example:

Properties
YAML

spring.security.oauth2.authorizationserver.client.my-client-1.registration.client-id=abcd
spring.security.oauth2.authorizationserver.client.my-client-1.registration.client-secret={noop}secret1
spring.security.oauth2.authorizationserver.client.my-client-1.registration.client-authentication-methods[0]=client_secret_basic
spring.security.oauth2.authorizationserver.client.my-client-1.registration.authorization-grant-types[0]=authorization_code
spring.security.oauth2.authorizationserver.client.my-client-1.registration.authorization-grant-types[1]=refresh_token
spring.security.oauth2.authorizationserver.client.my-client-1.registration.redirect-uris[0]=https://my-client-1.com/login/oauth2/code/abcd
spring.security.oauth2.authorizationserver.client.my-client-1.registration.redirect-uris[1]=https://my-client-1.com/authorized
spring.security.oauth2.authorizationserver.client.my-client-1.registration.scopes[0]=openid
spring.security.oauth2.authorizationserver.client.my-client-1.registration.scopes[1]=profile
spring.security.oauth2.authorizationserver.client.my-client-1.registration.scopes[2]=email
spring.security.oauth2.authorizationserver.client.my-client-1.registration.scopes[3]=phone
spring.security.oauth2.authorizationserver.client.my-client-1.registration.scopes[4]=address
spring.security.oauth2.authorizationserver.client.my-client-1.require-authorization-consent=true
spring.security.oauth2.authorizationserver.client.my-client-2.registration.client-id=efgh
spring.security.oauth2.authorizationserver.client.my-client-2.registration.client-secret={noop}secret2
spring.security.oauth2.authorizationserver.client.my-client-2.registration.client-authentication-methods[0]=client_secret_jwt
spring.security.oauth2.authorizationserver.client.my-client-2.registration.authorization-grant-types[0]=client_credentials
spring.security.oauth2.authorizationserver.client.my-client-2.registration.scopes[0]=user.read
spring.security.oauth2.authorizationserver.client.my-client-2.registration.scopes[1]=user.write
spring.security.oauth2.authorizationserver.client.my-client-2.jwk-set-uri=https://my-client-2.com/jwks
spring.security.oauth2.authorizationserver.client.my-client-2.token-endpoint-authentication-signing-algorithm=RS256

spring:
  security:
    oauth2:
      authorizationserver:
        client:
          my-client-1:
            registration:
              client-id: "abcd"
              client-secret: "{noop}secret1"
              client-authentication-methods:
                - "client_secret_basic"
              authorization-grant-types:
                - "authorization_code"
                - "refresh_token"
              redirect-uris:
                - "https://my-client-1.com/login/oauth2/code/abcd"
                - "https://my-client-1.com/authorized"
              scopes:
                - "openid"
                - "profile"
                - "email"
                - "phone"
                - "address"
            require-authorization-consent: true
          my-client-2:
            registration:
              client-id: "efgh"
              client-secret: "{noop}secret2"
              client-authentication-methods:
                - "client_secret_jwt"
              authorization-grant-types:
                - "client_credentials"
              scopes:
                - "user.read"
                - "user.write"
            jwk-set-uri: "https://my-client-2.com/jwks"
            token-endpoint-authentication-signing-algorithm: "RS256"

The client-secret property must be in a format that can be matched by the configured PasswordEncoder. The default instance of PasswordEncoder is created via PasswordEncoderFactories.createDelegatingPasswordEncoder().

The auto-configuration Spring Boot provides for Spring Authorization Server is designed for getting started quickly. Most applications will require customization and will want to define several beans to override auto-configuration.

The following components can be defined as beans to override auto-configuration specific to Spring Authorization Server:

RegisteredClientRepository
AuthorizationServerSettings
SecurityFilterChain
com.nimbusds.jose.jwk.source.JWKSource<com.nimbusds.jose.proc.SecurityContext>
JwtDecoder

Spring Boot auto-configures an InMemoryRegisteredClientRepository which is used by Spring Authorization Server for the management of registered clients. The InMemoryRegisteredClientRepository has limited capabilities and we recommend using it only for development environments. For production environments, consider using a JdbcRegisteredClientRepository or creating your own implementation of RegisteredClientRepository.

Additional information can be found in the Getting Started chapter of the Spring Authorization Server Reference Guide.

SAML 2.0

Relying Party

If you have spring-security-saml2-service-provider on your classpath, you can take advantage of some auto-configuration to set up a SAML 2.0 Relying Party. This configuration makes use of the properties under Saml2RelyingPartyProperties.

A relying party registration represents a paired configuration between an Identity Provider, IDP, and a Service Provider, SP. You can register multiple relying parties under the spring.security.saml2.relyingparty prefix, as shown in the following example:

Properties
YAML

spring.security.saml2.relyingparty.registration.my-relying-party1.signing.credentials[0].private-key-location=path-to-private-key
spring.security.saml2.relyingparty.registration.my-relying-party1.signing.credentials[0].certificate-location=path-to-certificate
spring.security.saml2.relyingparty.registration.my-relying-party1.decryption.credentials[0].private-key-location=path-to-private-key
spring.security.saml2.relyingparty.registration.my-relying-party1.decryption.credentials[0].certificate-location=path-to-certificate
spring.security.saml2.relyingparty.registration.my-relying-party1.singlelogout.url=https://myapp/logout/saml2/slo
spring.security.saml2.relyingparty.registration.my-relying-party1.singlelogout.response-url=https://remoteidp2.slo.url
spring.security.saml2.relyingparty.registration.my-relying-party1.singlelogout.binding=POST
spring.security.saml2.relyingparty.registration.my-relying-party1.assertingparty.verification.credentials[0].certificate-location=path-to-verification-cert
spring.security.saml2.relyingparty.registration.my-relying-party1.assertingparty.entity-id=remote-idp-entity-id1
spring.security.saml2.relyingparty.registration.my-relying-party1.assertingparty.sso-url=https://remoteidp1.sso.url
spring.security.saml2.relyingparty.registration.my-relying-party2.signing.credentials[0].private-key-location=path-to-private-key
spring.security.saml2.relyingparty.registration.my-relying-party2.signing.credentials[0].certificate-location=path-to-certificate
spring.security.saml2.relyingparty.registration.my-relying-party2.decryption.credentials[0].private-key-location=path-to-private-key
spring.security.saml2.relyingparty.registration.my-relying-party2.decryption.credentials[0].certificate-location=path-to-certificate
spring.security.saml2.relyingparty.registration.my-relying-party2.assertingparty.verification.credentials[0].certificate-location=path-to-other-verification-cert
spring.security.saml2.relyingparty.registration.my-relying-party2.assertingparty.entity-id=remote-idp-entity-id2
spring.security.saml2.relyingparty.registration.my-relying-party2.assertingparty.sso-url=https://remoteidp2.sso.url
spring.security.saml2.relyingparty.registration.my-relying-party2.assertingparty.singlelogout.url=https://remoteidp2.slo.url
spring.security.saml2.relyingparty.registration.my-relying-party2.assertingparty.singlelogout.response-url=https://myapp/logout/saml2/slo
spring.security.saml2.relyingparty.registration.my-relying-party2.assertingparty.singlelogout.binding=POST

spring:
  security:
    saml2:
      relyingparty:
        registration:
          my-relying-party1:
            signing:
              credentials:
              - private-key-location: "path-to-private-key"
                certificate-location: "path-to-certificate"
            decryption:
              credentials:
              - private-key-location: "path-to-private-key"
                certificate-location: "path-to-certificate"
            singlelogout:
               url: "https://myapp/logout/saml2/slo"
               response-url: "https://remoteidp2.slo.url"
               binding: "POST"
            assertingparty:
              verification:
                credentials:
                - certificate-location: "path-to-verification-cert"
              entity-id: "remote-idp-entity-id1"
              sso-url: "https://remoteidp1.sso.url"

          my-relying-party2:
            signing:
              credentials:
              - private-key-location: "path-to-private-key"
                certificate-location: "path-to-certificate"
            decryption:
              credentials:
              - private-key-location: "path-to-private-key"
                certificate-location: "path-to-certificate"
            assertingparty:
              verification:
                credentials:
                - certificate-location: "path-to-other-verification-cert"
              entity-id: "remote-idp-entity-id2"
              sso-url: "https://remoteidp2.sso.url"
              singlelogout:
                url: "https://remoteidp2.slo.url"
                response-url: "https://myapp/logout/saml2/slo"
                binding: "POST"

For SAML2 logout, by default, Spring Security’s Saml2LogoutRequestFilter and Saml2LogoutResponseFilter only process URLs matching /logout/saml2/slo. If you want to customize the url to which AP-initiated logout requests get sent to or the response-url to which an AP sends logout responses to, to use a different pattern, you need to provide configuration to process that custom pattern. For example, for servlet applications, you can add your own SecurityFilterChain that resembles the following:

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.web.SecurityFilterChain;

import static org.springframework.security.config.Customizer.withDefaults;

@Configuration(proxyBeanMethods = false)
public class MySamlRelyingPartyConfiguration {

	@Bean
	public SecurityFilterChain securityFilterChain(HttpSecurity http) throws Exception {
		http.authorizeHttpRequests((requests) -> requests.anyRequest().authenticated());
		http.saml2Login(withDefaults());
		http.saml2Logout((saml2) -> saml2.logoutRequest((request) -> request.logoutUrl("/SLOService.saml2"))
			.logoutResponse((response) -> response.logoutUrl("/SLOService.saml2")));
		return http.build();
	}

}