============================================================================== docs/output/07-wildcard-credentials.txt allowedOrigins("*") together with allowCredentials(true). Legal to configure, illegal to serve. The failure is thrown on the request, not at startup - and it does not surface as a 500. Profile: wildcard ============================================================================== HTTP/1.1 401 Vary: Origin Vary: Access-Control-Request-Method Vary: Access-Control-Request-Headers X-Content-Type-Options: nosniff X-XSS-Protection: 0 Cache-Control: no-cache, no-store, max-age=0, must-revalidate Pragma: no-cache X-Frame-Options: DENY Set-Cookie: JSESSIONID=; Path=/; HttpOnly; SameSite=Lax WWW-Authenticate: Basic realm="Realm", charset="UTF-8" # and a plain authenticated GET, with correct credentials: HTTP/1.1 401 Vary: Origin Vary: Access-Control-Request-Method Vary: Access-Control-Request-Headers X-Content-Type-Options: nosniff X-XSS-Protection: 0 Cache-Control: no-cache, no-store, max-age=0, must-revalidate Pragma: no-cache X-Frame-Options: DENY Set-Cookie: JSESSIONID=; Path=/; HttpOnly; SameSite=Lax WWW-Authenticate: Basic realm="Realm", charset="UTF-8" java.lang.IllegalArgumentException: When allowCredentials is true, allowedOrigins cannot contain the special value "*" since that cannot be set on the "Access-Control-Allow-Origin" response header. To allow credentials to a set of origins, list them explicitly or consider using "allowedOriginPatterns" instead. at org.springframework.web.cors.CorsConfiguration.validateAllowCredentials(CorsConfiguration.java:552) ~[spring-web-7.0.9.jar:7.0.9] at org.springframework.web.cors.CorsConfiguration.checkOrigin(CorsConfiguration.java:678) ~[spring-web-7.0.9.jar:7.0.9] at org.springframework.web.cors.DefaultCorsProcessor.checkOrigin(DefaultCorsProcessor.java:193) ~[spring-web-7.0.9.jar:7.0.9] at org.springframework.web.cors.DefaultCorsProcessor.handleInternal(DefaultCorsProcessor.java:131) ~[spring-web-7.0.9.jar:7.0.9] # 401, not 500. The exception escapes CorsFilter, Tomcat re-dispatches to /error, # the security chain runs again on that dispatch without re-reading the credential, # and the anonymous second pass is what answers.