diff --git a/src/main/java/com/eactive/apim/portal/common/exception/PortalGlobalExceptionHandler.java b/src/main/java/com/eactive/apim/portal/common/exception/PortalGlobalExceptionHandler.java
index e848f6d..8f3d8f4 100644
--- a/src/main/java/com/eactive/apim/portal/common/exception/PortalGlobalExceptionHandler.java
+++ b/src/main/java/com/eactive/apim/portal/common/exception/PortalGlobalExceptionHandler.java
@@ -7,6 +7,7 @@ import java.util.Map;
 import java.util.stream.Collectors;
 import javax.servlet.http.HttpServletRequest;
 
+import com.eactive.apim.portal.common.util.SecurityUtil;
 import com.eactive.apim.portal.config.PortalProperties;
 import com.eactive.apim.portal.file.exception.InvalidFileException;
 import lombok.RequiredArgsConstructor;
@@ -54,7 +55,15 @@ public class PortalGlobalExceptionHandler {
 
     @ExceptionHandler(value = AccessDeniedException.class)
     public ModelAndView handleAccessDeniedException(HttpServletRequest request, AccessDeniedException ex) {
-        return new ModelAndView("redirect:/login");
+        // 미로그인 사용자는 로그인 페이지로 유도, 로그인 상태에서의 권한 부족은 오류 안내 페이지로 표시한다.
+        if (!SecurityUtil.isAuthenticated()) {
+            return new ModelAndView("redirect:/login");
+        }
+        log.warn("접근 권한 없음: loginId={}, uri={}", SecurityUtil.getCurrentLoginId(), request.getRequestURI());
+        ModelAndView modelAndView = new ModelAndView("error");
+        modelAndView.addObject("errorTitle", "페이지 접근 권한이 없습니다.");
+        modelAndView.addObject("errorDescription", "해당 페이지를 이용할 수 있는 권한이 없는 계정입니다.\n권한이 필요한 경우 관리자에게 문의해 주세요.");
+        return modelAndView;
     }
 
     @ExceptionHandler(value = PortalRedirectException.class)
diff --git a/src/main/resources/templates/views/error.html b/src/main/resources/templates/views/error.html
index 1ee833e..49a6169 100644
--- a/src/main/resources/templates/views/error.html
+++ b/src/main/resources/templates/views/error.html
@@ -75,6 +75,7 @@
             color: #212529;
             text-align: center;
             line-height: 1.6;
+            white-space: pre-line;
         }
 
         .error-buttons {
diff --git a/src/main/resources/templates/views/fragment/djbank/header_container.html b/src/main/resources/templates/views/fragment/djbank/header_container.html
index 1353991..87aeaa4 100644
--- a/src/main/resources/templates/views/fragment/djbank/header_container.html
+++ b/src/main/resources/templates/views/fragment/djbank/header_container.html
@@ -93,7 +93,7 @@
                       </li>
                       <li sec:authorize="hasRole('ROLE_APP')">
                         <a th:href="@{/myapikey}"><i class="fas fa-key"></i>인증 키 관리</a>
-                        <a th:href="@{/webhook}"><i class="fas fa-bell"></i>Webhook 관리</a>
+                        <a th:href="@{/webhook}" sec:authorize="hasRole('ROLE_API_KEY_REQUEST')"><i class="fas fa-bell"></i>Webhook 관리</a>
                         <a th:href="@{/statistics/api}"><i class="fas fa-chart-bar"></i>이용 통계</a>
                       </li>
                       <li><a th:href="@{/mypage}"><i class="fas fa-user-circle"></i>내 정보 관리</a></li>
@@ -250,7 +250,7 @@
             <ul class="drawer-submenu">
               <li sec:authorize="hasRole('ROLE_USER_MANAGER')"><a th:href="@{/users}">이용자 관리</a></li>
               <li sec:authorize="hasRole('ROLE_APP')"><a th:href="@{/myapikey}">인증 키 관리</a></li>
-              <li sec:authorize="hasRole('ROLE_APP')"><a th:href="@{/webhook}">Webhook 관리</a></li>
+              <li sec:authorize="hasRole('ROLE_API_KEY_REQUEST')"><a th:href="@{/webhook}">Webhook 관리</a></li>
               <li sec:authorize="hasRole('ROLE_APP')"><a th:href="@{/statistics/api}">이용 통계</a></li>
               <li><a th:href="@{/mypage}">내 정보 관리</a></li>
               <li><a th:href="@{/change_password}">비밀번호 변경</a></li>
diff --git a/src/main/resources/templates/views/fragment/djbank/service_sidebar.html b/src/main/resources/templates/views/fragment/djbank/service_sidebar.html
index 032f173..b05498c 100644
--- a/src/main/resources/templates/views/fragment/djbank/service_sidebar.html
+++ b/src/main/resources/templates/views/fragment/djbank/service_sidebar.html
@@ -62,7 +62,7 @@
                 <a th:href="@{/webhook}"
                    th:classappend="${activeMenu == 'webhook'} ? 'service-nav__item--active' : ''"
                    class="service-nav__item"
-                   sec:authorize="hasRole('ROLE_APP')">Webhook 관리</a>
+                   sec:authorize="hasRole('ROLE_API_KEY_REQUEST')">Webhook 관리</a>
 
                 <a th:href="@{/statistics/api}"
                    th:classappend="${activeMenu == 'statistics'} ? 'service-nav__item--active' : ''"