diff --git a/config/src/test/java/org/springframework/security/config/annotation/web/configurers/oauth2/client/OAuth2LoginConfigurerTests.java b/config/src/test/java/org/springframework/security/config/annotation/web/configurers/oauth2/client/OAuth2LoginConfigurerTests.java
index 15f0dd2996..9fac94fae1 100644
--- a/config/src/test/java/org/springframework/security/config/annotation/web/configurers/oauth2/client/OAuth2LoginConfigurerTests.java
+++ b/config/src/test/java/org/springframework/security/config/annotation/web/configurers/oauth2/client/OAuth2LoginConfigurerTests.java
@@ -36,6 +36,7 @@ import org.springframework.context.ApplicationListener;
 import org.springframework.context.ConfigurableApplicationContext;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
+import org.springframework.http.HttpStatus;
 import org.springframework.http.MediaType;
 import org.springframework.mock.web.MockFilterChain;
 import org.springframework.mock.web.MockHttpServletRequest;
@@ -85,9 +86,11 @@ import org.springframework.security.oauth2.jwt.JwtDecoder;
 import org.springframework.security.oauth2.jwt.JwtDecoderFactory;
 import org.springframework.security.oauth2.jwt.TestJwts;
 import org.springframework.security.web.FilterChainProxy;
+import org.springframework.security.web.authentication.HttpStatusEntryPoint;
 import org.springframework.security.web.context.HttpRequestResponseHolder;
 import org.springframework.security.web.context.HttpSessionSecurityContextRepository;
 import org.springframework.security.web.context.SecurityContextRepository;
+import org.springframework.security.web.util.matcher.RequestHeaderRequestMatcher;
 import org.springframework.test.web.servlet.MockMvc;
 import org.springframework.web.context.support.AnnotationConfigWebApplicationContext;
 
@@ -401,6 +404,30 @@ public class OAuth2LoginConfigurerTests {
 		assertThat(this.response.getRedirectedUrl()).doesNotMatch("http://localhost/oauth2/authorization/google");
 	}
 
+	@Test
+	public void oauth2LoginWithHttpBasicOneClientConfiguredAndRequestXHRNotAuthenticatedThenUnauthorized()
+			throws Exception {
+		loadConfig(OAuth2LoginWithHttpBasicConfig.class);
+		String requestUri = "/";
+		this.request = new MockHttpServletRequest("GET", requestUri);
+		this.request.setServletPath(requestUri);
+		this.request.addHeader("X-Requested-With", "XMLHttpRequest");
+		this.springSecurityFilterChain.doFilter(this.request, this.response, this.filterChain);
+		assertThat(this.response.getStatus()).isEqualTo(401);
+	}
+
+	@Test
+	public void oauth2LoginWithXHREntryPointOneClientConfiguredAndRequestXHRNotAuthenticatedThenUnauthorized()
+			throws Exception {
+		loadConfig(OAuth2LoginWithXHREntryPointConfig.class);
+		String requestUri = "/";
+		this.request = new MockHttpServletRequest("GET", requestUri);
+		this.request.setServletPath(requestUri);
+		this.request.addHeader("X-Requested-With", "XMLHttpRequest");
+		this.springSecurityFilterChain.doFilter(this.request, this.response, this.filterChain);
+		assertThat(this.response.getStatus()).isEqualTo(401);
+	}
+
 	// gh-9457
 	@Test
 	public void oauth2LoginWithOneAuthorizationCodeClientAndOtherClientsConfiguredThenRedirectForAuthorization()
@@ -896,6 +923,45 @@ public class OAuth2LoginConfigurerTests {
 
 	}
 
+	@EnableWebSecurity
+	static class OAuth2LoginWithHttpBasicConfig extends CommonWebSecurityConfigurerAdapter {
+
+		@Override
+		protected void configure(HttpSecurity http) throws Exception {
+			// @formatter:off
+			http
+				.oauth2Login()
+					.clientRegistrationRepository(
+							new InMemoryClientRegistrationRepository(GOOGLE_CLIENT_REGISTRATION))
+					.and()
+				.httpBasic();
+			// @formatter:on
+			super.configure(http);
+		}
+
+	}
+
+	@EnableWebSecurity
+	static class OAuth2LoginWithXHREntryPointConfig extends CommonWebSecurityConfigurerAdapter {
+
+		@Override
+		protected void configure(HttpSecurity http) throws Exception {
+			// @formatter:off
+			http
+				.oauth2Login()
+					.clientRegistrationRepository(
+							new InMemoryClientRegistrationRepository(GOOGLE_CLIENT_REGISTRATION))
+					.and()
+				.exceptionHandling()
+					.defaultAuthenticationEntryPointFor(
+							new HttpStatusEntryPoint(HttpStatus.UNAUTHORIZED),
+							new RequestHeaderRequestMatcher("X-Requested-With", "XMLHttpRequest"));
+			// @formatter:on
+			super.configure(http);
+		}
+
+	}
+
 	private abstract static class CommonWebSecurityConfigurerAdapter extends WebSecurityConfigurerAdapter {
 
 		@Override
diff --git a/config/src/test/java/org/springframework/security/config/web/server/OAuth2LoginTests.java b/config/src/test/java/org/springframework/security/config/web/server/OAuth2LoginTests.java
index 069271b878..dcf4761167 100644
--- a/config/src/test/java/org/springframework/security/config/web/server/OAuth2LoginTests.java
+++ b/config/src/test/java/org/springframework/security/config/web/server/OAuth2LoginTests.java
@@ -232,6 +232,19 @@ public class OAuth2LoginTests {
 		// @formatter:on
 	}
 
+	@Test
+	public void defaultLoginPageWithOAuth2LoginHttpBasicAndXhrRequestThenUnauthorized() {
+		this.spring.register(OAuth2LoginWithSingleClientRegistrations.class, OAuth2LoginWithHttpBasic.class,
+				WebFluxConfig.class).autowire();
+		// @formatter:off
+		this.client.get()
+				.uri("/")
+				.header("X-Requested-With", "XMLHttpRequest")
+				.exchange()
+				.expectStatus().isUnauthorized();
+		// @formatter:on
+	}
+
 	@Test
 	public void oauth2AuthorizeWhenCustomObjectsThenUsed() {
 		this.spring.register(OAuth2LoginWithSingleClientRegistrations.class, OAuth2AuthorizeWithMockObjectsConfig.class,
@@ -660,6 +673,30 @@ public class OAuth2LoginTests {
 
 	}
 
+	@Configuration
+	static class OAuth2LoginWithHttpBasic {
+
+		@Bean
+		SecurityWebFilterChain springSecurityFilter(ServerHttpSecurity http) {
+			ReactiveUserDetailsService reactiveUserDetailsService = ReactiveAuthenticationTestConfiguration
+					.userDetailsService();
+			ReactiveAuthenticationManager authenticationManager = new UserDetailsRepositoryReactiveAuthenticationManager(
+					reactiveUserDetailsService);
+			http.authenticationManager(authenticationManager);
+			// @formatter:off
+			http
+				.authorizeExchange()
+					.anyExchange().authenticated()
+					.and()
+				.oauth2Login()
+					.and()
+				.httpBasic();
+			// @formatter:on
+			return http.build();
+		}
+
+	}
+
 	@Configuration
 	static class OAuth2LoginMockAuthenticationManagerConfig {