diff --git a/src/inspector/dom_storage_agent.cc b/src/inspector/dom_storage_agent.cc
index 3708d3b59975..caf7ca98f7d3 100644
--- a/src/inspector/dom_storage_agent.cc
+++ b/src/inspector/dom_storage_agent.cc
@@ -101,10 +101,12 @@ protocol::DispatchResponse DOMStorageAgent::getDOMStorageItems(
   std::optional<StorageMap> storage_map_fallback;
   if (storage_map->empty()) {
     auto web_storage_obj = getWebStorage(is_local_storage);
-    if (web_storage_obj) {
-      storage_map_fallback = web_storage_obj.value()->GetAll();
-      storage_map = &storage_map_fallback.value();
+    if (!web_storage_obj) {
+      return protocol::DispatchResponse::ServerError(
+          "Could not read DOM storage items");
     }
+    storage_map_fallback = web_storage_obj.value()->GetAll();
+    storage_map = &storage_map_fallback.value();
   }
 
   auto result =
diff --git a/test/parallel/test-inspector-dom-storage-unavailable.js b/test/parallel/test-inspector-dom-storage-unavailable.js
new file mode 100644
index 000000000000..73db9ae00421
--- /dev/null
+++ b/test/parallel/test-inspector-dom-storage-unavailable.js
@@ -0,0 +1,31 @@
+// Flags: --experimental-storage-inspection --no-warnings
+'use strict';
+const common = require('../common');
+
+common.skipIfInspectorDisabled();
+
+const inspector = require('node:inspector/promises');
+const assert = require('node:assert');
+
+(async () => {
+  const session = new inspector.Session();
+  session.connect();
+
+  await session.post('DOMStorage.enable');
+
+  await assert.rejects(
+    session.post('DOMStorage.getDOMStorageItems', {
+      storageId: {
+        isLocalStorage: true,
+        securityOrigin: '',
+        storageKey: '',
+      },
+    }),
+    {
+      code: 'ERR_INSPECTOR_COMMAND',
+      message: 'Inspector error -32000: Could not read DOM storage items',
+    },
+  );
+
+  session.disconnect();
+})().then(common.mustCall());