diff --git a/src/inabox/amp-inabox.js b/src/inabox/amp-inabox.js
index ef2d525c1b92..885c9652a8c5 100644
--- a/src/inabox/amp-inabox.js
+++ b/src/inabox/amp-inabox.js
@@ -48,6 +48,7 @@ import {installViewerServiceForDoc} from '../service/viewer-impl';
 import {internalRuntimeVersion} from '../internal-version';
 import {isExperimentOn} from '../experiments';
 import {maybeValidate} from '../validator-integration';
+import {rejectServicePromiseForDoc} from '../service';
 import {startupChunk} from '../chunk';
 import {stubElementsForDoc} from '../service/custom-element-registry';
 
@@ -93,6 +94,9 @@ startupChunk(self.document, function initial() {
     fullCss,
     () => {
       startupChunk(self.document, function services() {
+        // For security, storage is not supported in inabox.
+        // Fail early with console errors for any attempt of access.
+        unsupportedService(ampdoc, 'storage');
         // Core services.
         installRuntimeServices(self);
         fontStylesheetTimeout(self);
@@ -150,3 +154,15 @@ self.document.documentElement.setAttribute(
   'amp-version',
   internalRuntimeVersion()
 );
+
+/**
+ * @param {!../service/ampdoc-impl.AmpDoc} ampdoc
+ * @param {string} name
+ */
+function unsupportedService(ampdoc, name) {
+  rejectServicePromiseForDoc(
+    ampdoc,
+    name,
+    new Error('Un-supported service: ' + name)
+  );
+}
diff --git a/src/service/core-services.js b/src/service/core-services.js
index 9ee155de8a0e..682570ae7686 100644
--- a/src/service/core-services.js
+++ b/src/service/core-services.js
@@ -92,7 +92,10 @@ export function installAmpdocServices(ampdoc, opt_initParams, opt_inabox) {
   installUrlReplacementsServiceForDoc(ampdoc);
   installActionServiceForDoc(ampdoc);
   installStandardActionsForDoc(ampdoc);
-  installStorageServiceForDoc(ampdoc);
+  if (!opt_inabox) {
+    // For security, Storage is not supported in inabox.
+    installStorageServiceForDoc(ampdoc);
+  }
   installGlobalNavigationHandlerForDoc(ampdoc);
   installGlobalSubmitListenerForDoc(ampdoc);
 }