diff --git a/kngil/auth/oidc-login.php b/kngil/auth/oidc-login.php
index 1cd80dc..9752f4e 100644
--- a/kngil/auth/oidc-login.php
+++ b/kngil/auth/oidc-login.php
@@ -1,5 +1,7 @@
 <?php
 // /kngil/auth/oidc-login.php
+require_once dirname(__DIR__) . '/bbs/env.php';
+kngil_start_session();
 require_once dirname(__DIR__) . '/vendor/autoload.php';
 $config = require_once dirname(__DIR__) . '/bbs/oidc_config.php';
 
diff --git a/kngil/js/common.js b/kngil/js/common.js
index 6a192aa..534195e 100644
--- a/kngil/js/common.js
+++ b/kngil/js/common.js
@@ -4921,18 +4921,28 @@ var Swiper=function(){"use strict";function e(e){return null!==e&&"object"==type
     const buttons = document.querySelectorAll('[data-oidc-login]');
     if (!buttons.length) return;
     buttons.forEach((button) => {
-      button.addEventListener('click', openOidcLogin);
+      if (button.dataset.oidcBound === '1') return;
+      button.dataset.oidcBound = '1';
+      button.addEventListener('click', (event) => {
+        event.preventDefault();
+        window.openOidcLogin();
+      });
     });
   }
 
-  window.openOidcLogin = openOidcLogin;
-  window.login = openOidcLogin;
+  if (!window.openOidcLogin) {
+    window.openOidcLogin = openOidcLogin;
+  }
+  window.login = window.openOidcLogin;
 
-  window.addEventListener('message', (event) => {
-    if (event.data && event.data.type === 'OIDC_LOGIN_SUCCESS') {
-      window.location.reload();
-    }
-  });
+  if (!window.__oidcLoginMessageBound) {
+    window.addEventListener('message', (event) => {
+      if (event.data && event.data.type === 'OIDC_LOGIN_SUCCESS') {
+        window.location.reload();
+      }
+    });
+    window.__oidcLoginMessageBound = true;
+  }
 
   if (document.readyState === 'loading') {
     document.addEventListener('DOMContentLoaded', bindOidcButtons);
diff --git a/kngil/skin/_header.php b/kngil/skin/_header.php
index f2d4bd6..8717ad2 100644
--- a/kngil/skin/_header.php
+++ b/kngil/skin/_header.php
@@ -24,7 +24,7 @@ if ($displayName === '') {
 }
 
 // 권한 그룹
-$isSuperAdmin   = in_array($auth, ['BS100100', 'BS100200']); 
+$isSuperAdmin   = in_array($auth, ['BS100100', 'BS100200']);
 $isCompanyAdmin = in_array($auth, ['BS100100', 'BS100200', 'BS100300', 'BS100400']);
 ?>
 <head>
@@ -144,6 +144,55 @@ $isCompanyAdmin = in_array($auth, ['BS100100', 'BS100200', 'BS100300', 'BS100400
     window.IS_LOGIN = <?= isset($_SESSION['login']) ? 'true' : 'false' ?>;
     window.IDP_SERVICE_URL = <?= json_encode($idpServiceUrl, JSON_UNESCAPED_SLASHES) ?>;
   </script>
+  <script>
+    (function () {
+      function openOidcLoginPopup() {
+        const width = 500;
+        const height = 600;
+        const left = (window.screen.width / 2) - (width / 2);
+        const top = (window.screen.height / 2) - (height / 2);
+
+        window.open(
+          '/kngil/auth/oidc-login.php',
+          'oidc_login_popup',
+          `width=${width},height=${height},left=${left},top=${top},scrollbars=yes`
+        );
+      }
+
+      if (!window.openOidcLogin) {
+        window.openOidcLogin = openOidcLoginPopup;
+      }
+      window.login = window.openOidcLogin;
+
+      if (!window.__oidcLoginMessageBound) {
+        window.addEventListener('message', function (event) {
+          if (event.data && event.data.type === 'OIDC_LOGIN_SUCCESS') {
+            window.location.reload();
+          }
+        });
+        window.__oidcLoginMessageBound = true;
+      }
+
+      function bindOidcButtons() {
+        const buttons = document.querySelectorAll('[data-oidc-login]');
+        if (!buttons.length) return;
+        buttons.forEach((button) => {
+          if (button.dataset.oidcBound === '1') return;
+          button.dataset.oidcBound = '1';
+          button.addEventListener('click', function (event) {
+            event.preventDefault();
+            window.openOidcLogin();
+          });
+        });
+      }
+
+      if (document.readyState === 'loading') {
+        document.addEventListener('DOMContentLoaded', bindOidcButtons);
+      } else {
+        bindOidcButtons();
+      }
+    })();
+  </script>
 </head>
 
 <!-- header -->
@@ -164,7 +213,7 @@ $isCompanyAdmin = in_array($auth, ['BS100100', 'BS100200', 'BS100300', 'BS100400
           </span>
           <a href="/kngil/bbs/logout.php" class="btn-logout-top">로그아웃</a>
         <?php else: ?>
-          <button type="button" class="btn-oidc-top" data-oidc-login>[바론 통합로그인]</button>
+          <button type="button" class="btn-oidc-top" data-oidc-login>[바론 로그인]</button>
         <?php endif; ?>
       </div>
 
