diff --git a/api/src/main/java/io/kafbat/ui/service/acl/AclsService.java b/api/src/main/java/io/kafbat/ui/service/acl/AclsService.java
index 7521c5d79c..7cb886d16e 100644
--- a/api/src/main/java/io/kafbat/ui/service/acl/AclsService.java
+++ b/api/src/main/java/io/kafbat/ui/service/acl/AclsService.java
@@ -22,6 +22,7 @@
 import io.kafbat.ui.model.KafkaCluster;
 import io.kafbat.ui.service.AdminClientService;
 import io.kafbat.ui.service.ReactiveAdminClient;
+import io.kafbat.ui.service.ReactiveAdminClient.SupportedFeature;
 import io.kafbat.ui.service.index.AclBindingNgramFilter;
 import java.util.ArrayList;
 import java.util.Collection;
@@ -89,6 +90,7 @@ public Mono<Void> deleteAcl(KafkaCluster cluster, AclBinding aclBinding) {
   public Flux<AclBinding> listAcls(KafkaCluster cluster, ResourcePatternFilter filter, String principalSearch,
                                    Boolean fts) {
     return adminClientService.get(cluster)
+      .filter(c -> c.getClusterFeatures().contains(SupportedFeature.AUTHORIZED_SECURITY_ENABLED))
       .flatMap(c -> c.listAcls(filter))
       .map(lst -> filter(new ArrayList<>(lst), principalSearch, fts))
       .flatMapMany(Flux::fromIterable)
diff --git a/api/src/main/resources/static/openapi/kafbat-ui-api.yaml b/api/src/main/resources/static/openapi/kafbat-ui-api.yaml
index 195489f015..a81010fea9 100644
--- a/api/src/main/resources/static/openapi/kafbat-ui-api.yaml
+++ b/api/src/main/resources/static/openapi/kafbat-ui-api.yaml
@@ -3130,6 +3130,8 @@ components:
                             type: string
                           clientSecret:
                             type: string
+                          clientAuthenticationMethod:
+                            type: string
                           clientName:
                             type: string
                           redirectUri:
@@ -3306,6 +3308,29 @@ components:
                             type: string
                           password:
                             type: string
+                          oauth:
+                            type: object
+                            properties:
+                              tokenUrl:
+                                type: string
+                              clientId:
+                                type: string
+                              clientSecret:
+                                type: string
+                              scopes:
+                                type: array
+                                items:
+                                  type: string
+                              tokenCacheEnabled:
+                                type: boolean
+                                default: true
+                              tokenRefreshBuffer:
+                                type: string
+                                format: duration
+                              maxRetries:
+                                type: integer
+                                format: int32
+                                default: 1
                       schemaRegistrySsl:
                         type: object
                         properties:
diff --git a/frontend/src/components/Nav/Nav.styled.ts b/frontend/src/components/Nav/Nav.styled.ts
index 3f5e62ec44..f4e2749165 100644
--- a/frontend/src/components/Nav/Nav.styled.ts
+++ b/frontend/src/components/Nav/Nav.styled.ts
@@ -1,6 +1,10 @@
 import styled from 'styled-components';
 import { ClusterColorKey } from 'theme/theme';
 
+export const SearchWrapper = styled.div`
+  padding: 4px 4px 8px;
+`;
+
 export const List = styled.ul.attrs({ role: 'menu' })`
   & > & {
     padding: 0 0 0 8px;
diff --git a/frontend/src/components/Nav/Nav.tsx b/frontend/src/components/Nav/Nav.tsx
index 532f5e4dc2..337a9ca3c4 100644
--- a/frontend/src/components/Nav/Nav.tsx
+++ b/frontend/src/components/Nav/Nav.tsx
@@ -1,6 +1,7 @@
-import React, { type FC } from 'react';
+import React, { type FC, useState } from 'react';
 import { useClusters } from 'lib/hooks/api/clusters';
 import useCurrentClusterName from 'lib/hooks/useCurrentClusterName';
+import Search from 'components/common/Search/Search';
 
 import * as S from './Nav.styled';
 import MenuItem from './Menu/MenuItem';
@@ -9,14 +10,31 @@ import ClusterMenu from './ClusterMenu/ClusterMenu';
 const Nav: FC = () => {
   const clusters = useClusters();
   const clusterName = useCurrentClusterName();
+  const [search, setSearch] = useState('');
+
+  const filteredClusters =
+    clusters.isSuccess && search.trim()
+      ? clusters.data.filter((c) =>
+          c.name.toLowerCase().includes(search.toLowerCase())
+        )
+      : clusters.data;
 
   return (
     <aside aria-label="Sidebar Menu">
       <S.List>
         <MenuItem variant="primary" to="/" title="Dashboard" />
       </S.List>
+      {clusters.isSuccess && clusters.data.length > 0 && (
+        <S.SearchWrapper>
+          <Search
+            placeholder="Search clusters..."
+            value={search}
+            onChange={setSearch}
+          />
+        </S.SearchWrapper>
+      )}
       {clusters.isSuccess &&
-        clusters.data.map((cluster) => (
+        filteredClusters?.map((cluster) => (
           <ClusterMenu
             key={cluster.name}
             name={cluster.name}