diff --git a/qa/L0_cuda_shared_memory/cuda_shared_memory_test.py b/qa/L0_cuda_shared_memory/cuda_shared_memory_test.py
index f629fa6b16..12ade110f0 100755
--- a/qa/L0_cuda_shared_memory/cuda_shared_memory_test.py
+++ b/qa/L0_cuda_shared_memory/cuda_shared_memory_test.py
@@ -760,7 +760,7 @@ def test_exceeds_cshm_handle_size_limit(self):
                 error_message,
             )
             self.assertIn(
-                "exceeds the maximum allowed value",
+                "exceeds the maximum allowed input size",
                 error_message,
             )
         except ValueError:
diff --git a/qa/L0_http/http_test.py b/qa/L0_http/http_test.py
index 2ce2ea25c3..9ea65fddf6 100755
--- a/qa/L0_http/http_test.py
+++ b/qa/L0_http/http_test.py
@@ -499,6 +499,38 @@ def test_duplicate_output_names(self):
             "Server is not healthy after duplicate output request",
         )
 
+    def test_repository_index_deeply_nested_json(self):
+        """Test for deeply nested JSON on model repository index."""
+        depth = 250000
+        nested = ("[" * depth) + "true" + ("]" * depth)
+        payload = '{"ready":' + nested + "}"
+
+        # Keep request below default --http-max-input-size so parsing path is exercised.
+        self.assertLess(len(payload), 64 * 1024 * 1024)
+
+        response = requests.post(
+            "http://localhost:8000/v2/repository/index",
+            data=payload,
+            headers={"Content-Type": "application/json"},
+            timeout=60,
+        )
+        self.assertEqual(
+            400,
+            response.status_code,
+            "Expected repository index request to fail on invalid 'ready' type.",
+        )
+        self.assertIn(
+            "Invalid value for 'ready': expected a boolean",
+            response.json()["error"],
+        )
+
+        live_response = requests.get("http://localhost:8000/v2/health/live", timeout=10)
+        self.assertEqual(
+            200,
+            live_response.status_code,
+            "Expected server to remain live after deeply nested JSON request.",
+        )
+
 
 if __name__ == "__main__":
     unittest.main()
diff --git a/qa/L0_http/test.sh b/qa/L0_http/test.sh
index bfe7a94b46..e11cbde38b 100755
--- a/qa/L0_http/test.sh
+++ b/qa/L0_http/test.sh
@@ -672,7 +672,7 @@ fi
 
 TEST_RESULT_FILE='test_results.txt'
 PYTHON_TEST=http_test.py
-EXPECTED_NUM_TESTS=15
+EXPECTED_NUM_TESTS=16
 set +e
 python $PYTHON_TEST >$CLIENT_LOG 2>&1
 if [ $? -ne 0 ]; then
diff --git a/src/http_server.cc b/src/http_server.cc
index 765cfde64b..5cce136ede 100644
--- a/src/http_server.cc
+++ b/src/http_server.cc
@@ -1413,7 +1413,13 @@ HTTPAPIServer::HandleRepositoryIndex(
   if (buffer_len > 0) {
     triton::common::TritonJson::Value ready_json;
     if (index_request.Find("ready", &ready_json)) {
-      err = ready_json.AsBool(&ready);
+      if (!ready_json.IsBool()) {
+        err = TRITONSERVER_ErrorNew(
+            TRITONSERVER_ERROR_INVALID_ARG,
+            "Invalid value for 'ready': expected a boolean");
+      } else {
+        err = ready_json.AsBool(&ready);
+      }
     }
   }