diff --git a/package.json b/package.json
index 53d9ddb9728..7cd6e8cfdbe 100644
--- a/package.json
+++ b/package.json
@@ -96,7 +96,6 @@
     "intl-messageformat": "7.8.4",
     "ip": "2.0.1",
     "ipaddr.js": "2.2.0",
-    "is-base64": "1.1.0",
     "is-url": "1.2.4",
     "jexl": "2.2.2",
     "jquery": "3.5.1",
diff --git a/pkg/harvester-manager/machine-config/harvester.vue b/pkg/harvester-manager/machine-config/harvester.vue
index 28dc209dce2..af1539f762f 100644
--- a/pkg/harvester-manager/machine-config/harvester.vue
+++ b/pkg/harvester-manager/machine-config/harvester.vue
@@ -3,7 +3,7 @@ import draggable from 'vuedraggable';
 import isEmpty from 'lodash/isEmpty';
 import jsyaml from 'js-yaml';
 import YAML from 'yaml';
-import isBase64 from 'is-base64';
+import { isBase64 } from '@shell/utils/string';
 
 import NodeAffinity from '@shell/components/form/NodeAffinity';
 import PodAffinity from '@shell/components/form/PodAffinity';
diff --git a/shell/edit/provisioning.cattle.io.cluster/tabs/registries/RegistryConfigs.vue b/shell/edit/provisioning.cattle.io.cluster/tabs/registries/RegistryConfigs.vue
index f3777810739..5bd2bd32d5b 100644
--- a/shell/edit/provisioning.cattle.io.cluster/tabs/registries/RegistryConfigs.vue
+++ b/shell/edit/provisioning.cattle.io.cluster/tabs/registries/RegistryConfigs.vue
@@ -1,4 +1,5 @@
 <script>
+import { clone } from '@shell/utils/object';
 import ArrayListGrouped from '@shell/components/form/ArrayListGrouped';
 import { LabeledInput } from '@components/Form/LabeledInput';
 import { Checkbox } from '@components/Form/Checkbox';
@@ -6,6 +7,7 @@ import SelectOrCreateAuthSecret from '@shell/components/form/SelectOrCreateAuthS
 import CreateEditView from '@shell/mixins/create-edit-view';
 import SecretSelector from '@shell/components/form/SecretSelector';
 import { SECRET_TYPES as TYPES } from '@shell/config/secret';
+import { isBase64 } from '@shell/utils/string';
 import { base64Decode, base64Encode } from '@shell/utils/crypto';
 
 export default {
@@ -42,7 +44,7 @@ export default {
   },
 
   data() {
-    const configMap = this.value.spec.rkeConfig?.registries?.configs || {};
+    const configMap = clone(this.value.spec.rkeConfig?.registries?.configs) || {};
     const entries = [];
 
     const defaultAddValue = {
@@ -57,7 +59,11 @@ export default {
       if (configMap[hostname]) {
         configMap[hostname].insecureSkipVerify = configMap[hostname].insecureSkipVerify ?? defaultAddValue.insecureSkipVerify;
         configMap[hostname].authConfigSecretName = configMap[hostname].authConfigSecretName ?? defaultAddValue.authConfigSecretName;
-        configMap[hostname].caBundle = base64Decode(configMap[hostname].caBundle ?? defaultAddValue.caBundle);
+
+        const caBundle = configMap[hostname].caBundle ?? defaultAddValue.caBundle;
+
+        configMap[hostname].caBundle = isBase64(caBundle) ? base64Decode(caBundle) : caBundle;
+
         configMap[hostname].tlsSecretName = configMap[hostname].tlsSecretName ?? defaultAddValue.tlsSecretName;
       }
       entries.push({
diff --git a/shell/edit/provisioning.cattle.io.cluster/tabs/registries/__tests__/RegistryConfigs.test.ts b/shell/edit/provisioning.cattle.io.cluster/tabs/registries/__tests__/RegistryConfigs.test.ts
index f2120a97169..e310ea0626d 100644
--- a/shell/edit/provisioning.cattle.io.cluster/tabs/registries/__tests__/RegistryConfigs.test.ts
+++ b/shell/edit/provisioning.cattle.io.cluster/tabs/registries/__tests__/RegistryConfigs.test.ts
@@ -23,10 +23,13 @@ describe('component: RegistryConfigs', () => {
   };
 
   describe('key CA Cert Bundle', () => {
-    it('should display default key', () => {
+    it.each([
+      ['source is plain text', 'Zm9vYmFy', 'foobar'],
+      ['source is base64', 'foobar', 'foobar'],
+    ])('should display key, %p', (_, sourceCaBundle, displayedCaBundle) => {
       const value = clone(PROV_CLUSTER);
 
-      value.spec.rkeConfig.registries.configs = { foo: { caBundle: 'Zm9vYmFy' } };
+      value.spec.rkeConfig.registries.configs = { foo: { caBundle: sourceCaBundle } };
 
       mountOptions.propsData.value = value;
 
@@ -37,7 +40,7 @@ describe('component: RegistryConfigs', () => {
 
       const registry = wrapper.findComponent('[data-testid^="registry-caBundle"]');
 
-      expect(registry.props().value).toBe('foobar');
+      expect(registry.props().value).toBe(displayedCaBundle);
     });
 
     it('should update key in base64 format', async() => {
diff --git a/shell/utils/string.js b/shell/utils/string.js
index 898ec790693..ac8d6f4892f 100644
--- a/shell/utils/string.js
+++ b/shell/utils/string.js
@@ -330,3 +330,9 @@ export function sanitizeIP(v) {
 export function xOfy(x, y) {
   return `${ typeof x === 'number' ? x : '?' }/${ typeof y === 'number' ? y : '?' }`;
 }
+
+export function isBase64(value) {
+  const base64regex = /^([0-9a-zA-Z+/]{4})*(([0-9a-zA-Z+/]{2}==)|([0-9a-zA-Z+/]{3}=))?$/;
+
+  return base64regex.test(value);
+}
diff --git a/yarn.lock b/yarn.lock
index 9a487d7b496..2f6e87ed5c3 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -8029,6 +8029,7 @@ eslint-plugin-jest@24.4.0:
 
 "eslint-plugin-local-rules@link:./eslint-plugin-local-rules":
   version "0.0.0"
+  uid ""
 
 "eslint-plugin-local-rules@link:eslint-plugin-local-rules":
   version "0.0.0"
@@ -9329,7 +9330,18 @@ html-tags@^3.3.1:
     tapable "^1.1.3"
     util.promisify "1.0.0"
 
-"html-webpack-plugin-5@npm:html-webpack-plugin@^5", html-webpack-plugin@^5.0.0, html-webpack-plugin@^5.1.0:
+"html-webpack-plugin-5@npm:html-webpack-plugin@^5":
+  version "5.6.0"
+  resolved "https://registry.npmjs.org/html-webpack-plugin/-/html-webpack-plugin-5.6.0.tgz#50a8fa6709245608cb00e811eacecb8e0d7b7ea0"
+  integrity sha512-iwaY4wzbe48AfKLZ/Cc8k0L+FKG6oSNRaZ8x5A/T/IVDGyXcbHncM9TdDa93wn0FsSm82FhTKW7f3vS61thXAw==
+  dependencies:
+    "@types/html-minifier-terser" "^6.0.0"
+    html-minifier-terser "^6.0.2"
+    lodash "^4.17.21"
+    pretty-error "^4.0.0"
+    tapable "^2.0.0"
+
+html-webpack-plugin@^5.0.0, html-webpack-plugin@^5.1.0:
   version "5.6.0"
   resolved "https://registry.npmjs.org/html-webpack-plugin/-/html-webpack-plugin-5.6.0.tgz#50a8fa6709245608cb00e811eacecb8e0d7b7ea0"
   integrity sha512-iwaY4wzbe48AfKLZ/Cc8k0L+FKG6oSNRaZ8x5A/T/IVDGyXcbHncM9TdDa93wn0FsSm82FhTKW7f3vS61thXAw==
@@ -9667,11 +9679,6 @@ is-arrayish@^0.3.1:
   resolved "https://registry.npmjs.org/is-arrayish/-/is-arrayish-0.3.2.tgz#4574a2ae56f7ab206896fb431eaeed066fdf8f03"
   integrity sha512-eVRqCvVlZbuw3GrM63ovNSNAeA1K16kaR/LRY/92w0zxQ5/1YzwblUX652i4Xs9RwAGjW9d9y6X88t8OaAJfWQ==
 
-is-base64@1.1.0:
-  version "1.1.0"
-  resolved "https://registry.npmjs.org/is-base64/-/is-base64-1.1.0.tgz#8ce1d719895030a457c59a7dcaf39b66d99d56b4"
-  integrity sha512-Nlhg7Z2dVC4/PTvIFkgVVNvPHSO2eR/Yd0XzhGiXCXEvWnptXlXa/clQ8aePPiMuxEGcWfzWbGw2Fe3d+Y3v1g==
-
 is-bigint@^1.0.1:
   version "1.0.4"
   resolved "https://registry.npmjs.org/is-bigint/-/is-bigint-1.0.4.tgz#08147a1875bc2b32005d41ccd8291dffc6691df3"
@@ -13933,7 +13940,7 @@ string-length@^4.0.1:
     char-regex "^1.0.2"
     strip-ansi "^6.0.0"
 
-"string-width-cjs@npm:string-width@^4.2.0", string-width@^4.1.0, string-width@^4.2.0, string-width@^4.2.3:
+"string-width-cjs@npm:string-width@^4.2.0":
   version "4.2.3"
   resolved "https://registry.npmjs.org/string-width/-/string-width-4.2.3.tgz#269c7117d27b05ad2e536830a8ec895ef9c6d010"
   integrity sha512-wKyQRQpjJ0sIp62ErSZdGsjMJWsap5oRNihHhu6G7JVO/9jIB6UyevL+tXuOqrng8j/cxKTWyWUwvSTriiZz/g==
@@ -13950,6 +13957,15 @@ string-width@^2.1.1:
     is-fullwidth-code-point "^2.0.0"
     strip-ansi "^4.0.0"
 
+string-width@^4.1.0, string-width@^4.2.0, string-width@^4.2.3:
+  version "4.2.3"
+  resolved "https://registry.npmjs.org/string-width/-/string-width-4.2.3.tgz#269c7117d27b05ad2e536830a8ec895ef9c6d010"
+  integrity sha512-wKyQRQpjJ0sIp62ErSZdGsjMJWsap5oRNihHhu6G7JVO/9jIB6UyevL+tXuOqrng8j/cxKTWyWUwvSTriiZz/g==
+  dependencies:
+    emoji-regex "^8.0.0"
+    is-fullwidth-code-point "^3.0.0"
+    strip-ansi "^6.0.1"
+
 string-width@^5.0.1, string-width@^5.1.2:
   version "5.1.2"
   resolved "https://registry.npmjs.org/string-width/-/string-width-5.1.2.tgz#14f8daec6d81e7221d2a357e668cab73bdbca794"
@@ -14001,7 +14017,7 @@ string_decoder@~1.1.1:
   dependencies:
     safe-buffer "~5.1.0"
 
-"strip-ansi-cjs@npm:strip-ansi@^6.0.1", strip-ansi@^6.0.0, strip-ansi@^6.0.1:
+"strip-ansi-cjs@npm:strip-ansi@^6.0.1":
   version "6.0.1"
   resolved "https://registry.npmjs.org/strip-ansi/-/strip-ansi-6.0.1.tgz#9e26c63d30f53443e9489495b2105d37b67a85d9"
   integrity sha512-Y38VPSHcqkFrCpFnQ9vuSXmquuv5oXOKpGeT6aGrr3o3Gc9AlVa6JBfUSOCnbxGGZF+/0ooI7KrPuUSztUdU5A==
@@ -14022,6 +14038,13 @@ strip-ansi@^4.0.0:
   dependencies:
     ansi-regex "^3.0.0"
 
+strip-ansi@^6.0.0, strip-ansi@^6.0.1:
+  version "6.0.1"
+  resolved "https://registry.npmjs.org/strip-ansi/-/strip-ansi-6.0.1.tgz#9e26c63d30f53443e9489495b2105d37b67a85d9"
+  integrity sha512-Y38VPSHcqkFrCpFnQ9vuSXmquuv5oXOKpGeT6aGrr3o3Gc9AlVa6JBfUSOCnbxGGZF+/0ooI7KrPuUSztUdU5A==
+  dependencies:
+    ansi-regex "^5.0.1"
+
 strip-ansi@^7.0.1:
   version "7.1.0"
   resolved "https://registry.npmjs.org/strip-ansi/-/strip-ansi-7.1.0.tgz#d5b6568ca689d8561370b0707685d22434faff45"
@@ -15297,7 +15320,7 @@ worker-loader@3.0.8:
     loader-utils "^2.0.0"
     schema-utils "^3.0.0"
 
-"wrap-ansi-cjs@npm:wrap-ansi@^7.0.0", wrap-ansi@^7.0.0:
+"wrap-ansi-cjs@npm:wrap-ansi@^7.0.0":
   version "7.0.0"
   resolved "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-7.0.0.tgz#67e145cff510a6a6984bdf1152911d69d2eb9e43"
   integrity sha512-YVGIj2kamLSTxw6NsZjoBxfSwsn0ycdesmc4p+Q21c5zPuZ1pl+NfxVdxPtdHvmNVOQ6XSYG4AUtyt/Fi7D16Q==
@@ -15323,6 +15346,15 @@ wrap-ansi@^6.2.0:
     string-width "^4.1.0"
     strip-ansi "^6.0.0"
 
+wrap-ansi@^7.0.0:
+  version "7.0.0"
+  resolved "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-7.0.0.tgz#67e145cff510a6a6984bdf1152911d69d2eb9e43"
+  integrity sha512-YVGIj2kamLSTxw6NsZjoBxfSwsn0ycdesmc4p+Q21c5zPuZ1pl+NfxVdxPtdHvmNVOQ6XSYG4AUtyt/Fi7D16Q==
+  dependencies:
+    ansi-styles "^4.0.0"
+    string-width "^4.1.0"
+    strip-ansi "^6.0.0"
+
 wrap-ansi@^8.1.0:
   version "8.1.0"
   resolved "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-8.1.0.tgz#56dc22368ee570face1b49819975d9b9a5ead214"