diff --git a/participation-service-backup.yaml b/participation-service-backup.yaml
new file mode 100644
index 0000000..661af2f
--- /dev/null
+++ b/participation-service-backup.yaml
@@ -0,0 +1,38 @@
+apiVersion: v1
+kind: Service
+metadata:
+  annotations:
+    kubectl.kubernetes.io/last-applied-configuration: |
+      {"apiVersion":"v1","kind":"Service","metadata":{"annotations":{},"labels":{"app":"participation-service","app.kubernetes.io/managed-by":"kustomize","app.kubernetes.io/part-of":"kt-event-marketing","environment":"dev"},"name":"participation-service","namespace":"kt-event-marketing"},"spec":{"ports":[{"name":"http","port":80,"protocol":"TCP","targetPort":8084}],"selector":{"app":"participation-service","app.kubernetes.io/managed-by":"kustomize","app.kubernetes.io/part-of":"kt-event-marketing","environment":"dev"},"type":"ClusterIP"}}
+  creationTimestamp: "2025-10-28T08:59:06Z"
+  labels:
+    app: participation-service
+    app.kubernetes.io/managed-by: kustomize
+    app.kubernetes.io/part-of: kt-event-marketing
+    environment: dev
+  name: participation-service
+  namespace: kt-event-marketing
+  resourceVersion: "125107611"
+  uid: da5b7f82-37d3-41bd-ad87-e2864c8bcd18
+spec:
+  clusterIP: 10.0.130.146
+  clusterIPs:
+  - 10.0.130.146
+  internalTrafficPolicy: Cluster
+  ipFamilies:
+  - IPv4
+  ipFamilyPolicy: SingleStack
+  ports:
+  - name: http
+    port: 80
+    protocol: TCP
+    targetPort: 8084
+  selector:
+    app: participation-service
+    app.kubernetes.io/managed-by: kustomize
+    app.kubernetes.io/part-of: kt-event-marketing
+    environment: dev
+  sessionAffinity: None
+  type: ClusterIP
+status:
+  loadBalancer: {}
diff --git a/participation-service-fixed.yaml b/participation-service-fixed.yaml
new file mode 100644
index 0000000..7dfac99
--- /dev/null
+++ b/participation-service-fixed.yaml
@@ -0,0 +1,27 @@
+apiVersion: v1
+kind: Service
+metadata:
+  labels:
+    app: participation-service
+    app.kubernetes.io/managed-by: kustomize
+    app.kubernetes.io/part-of: kt-event-marketing
+    environment: dev
+  name: participation-service
+  namespace: kt-event-marketing
+spec:
+  clusterIP: 10.0.130.146
+  clusterIPs:
+  - 10.0.130.146
+  internalTrafficPolicy: Cluster
+  ipFamilies:
+  - IPv4
+  ipFamilyPolicy: SingleStack
+  ports:
+  - name: http
+    port: 80
+    protocol: TCP
+    targetPort: 8084
+  selector:
+    app: participation-service
+  sessionAffinity: None
+  type: ClusterIP
\ No newline at end of file
diff --git a/participation-service/src/main/java/com/kt/event/participation/infrastructure/config/SecurityConfig.java b/participation-service/src/main/java/com/kt/event/participation/infrastructure/config/SecurityConfig.java
index def3f44..f11e549 100644
--- a/participation-service/src/main/java/com/kt/event/participation/infrastructure/config/SecurityConfig.java
+++ b/participation-service/src/main/java/com/kt/event/participation/infrastructure/config/SecurityConfig.java
@@ -24,7 +24,7 @@ import java.util.Arrays;
 @EnableWebSecurity
 public class SecurityConfig {
 
-    @Value("${cors.allowed-origins:http://localhost:*,https://kt-event-marketing-api.20.214.196.128.nip.io/api/v1}")
+    @Value("${cors.allowed-origins:*}")
     private String allowedOrigins;
 
     @Bean
diff --git a/participation-service/src/main/java/com/kt/event/participation/infrastructure/config/WebConfig.java b/participation-service/src/main/java/com/kt/event/participation/infrastructure/config/WebConfig.java
new file mode 100644
index 0000000..9d1c47e
--- /dev/null
+++ b/participation-service/src/main/java/com/kt/event/participation/infrastructure/config/WebConfig.java
@@ -0,0 +1,32 @@
+package com.kt.event.participation.infrastructure.config;
+
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.servlet.config.annotation.CorsRegistry;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
+
+/**
+ * Web Configuration
+ * CORS 설정 및 기타 웹 관련 설정
+ *
+ * @author System Architect
+ * @since 2025-10-30
+ */
+@Configuration
+public class WebConfig implements WebMvcConfigurer {
+
+    /**
+     * CORS 설정
+     * - 모든 origin 허용 (개발 환경)
+     * - 모든 HTTP 메서드 허용
+     * - Credentials 허용
+     */
+    @Override
+    public void addCorsMappings(CorsRegistry registry) {
+        registry.addMapping("/**")
+                .allowedOriginPatterns("*")
+                .allowedMethods("GET", "POST", "PUT", "DELETE", "PATCH", "OPTIONS")
+                .allowedHeaders("*")
+                .allowCredentials(true)
+                .maxAge(3600);
+    }
+}
\ No newline at end of file
diff --git a/participation-service/src/main/resources/application.yml b/participation-service/src/main/resources/application.yml
index 2f35890..44011c7 100644
--- a/participation-service/src/main/resources/application.yml
+++ b/participation-service/src/main/resources/application.yml
@@ -56,7 +56,7 @@ jwt:
 
 # CORS 설정
 cors:
-  allowed-origins: ${CORS_ALLOWED_ORIGINS:http://localhost:8081,http://localhost:8082,http://localhost:8083,http://localhost:8084,http://kt-event-marketing.20.214.196.128.nip.io}
+  allowed-origins: ${CORS_ALLOWED_ORIGINS:*}
   allowed-methods: ${CORS_ALLOWED_METHODS:GET,POST,PUT,DELETE,OPTIONS,PATCH}
   allowed-headers: ${CORS_ALLOWED_HEADERS:*}
   allow-credentials: ${CORS_ALLOW_CREDENTIALS:true}