diff --git a/source/extensions/filters/http/grpc_json_transcoder/json_transcoder_filter.cc b/source/extensions/filters/http/grpc_json_transcoder/json_transcoder_filter.cc
index 3bb7f57c56376..bbfee0b1c2729 100644
--- a/source/extensions/filters/http/grpc_json_transcoder/json_transcoder_filter.cc
+++ b/source/extensions/filters/http/grpc_json_transcoder/json_transcoder_filter.cc
@@ -344,8 +344,19 @@ ProtobufUtil::Status JsonTranscoderConfig::createTranscoder(
 
   for (const auto& binding : variable_bindings) {
     google::grpc::transcoding::RequestWeaver::BindingInfo resolved_binding;
-    status = type_helper_->ResolveFieldPath(*request_info.message_type, binding.field_path,
-                                            &resolved_binding.field_path);
+    {
+      /**
+       * type_helper_ is not a thread safe object. Its used
+       * `TypeInfoForTypeResolver
+       * <https://github.com/protocolbuffers/protobuf/blob/master/src/google/protobuf/util/internal/type_info.cc#L170>`_
+       * uses three mutable maps to cache used data. This function is called in the worker thread.
+       * Multiple worker threads may use type_helper concurrently and these maps could be corrupted.
+       * Hence use a mutex to protect it.
+       */
+      absl::MutexLock lock(&type_helper_mutex_);
+      status = type_helper_->ResolveFieldPath(*request_info.message_type, binding.field_path,
+                                              &resolved_binding.field_path);
+    }
     if (!status.ok()) {
       if (ignore_unknown_query_parameters_) {
         continue;
diff --git a/source/extensions/filters/http/grpc_json_transcoder/json_transcoder_filter.h b/source/extensions/filters/http/grpc_json_transcoder/json_transcoder_filter.h
index 95d71aeaada9a..15e07db7a2cac 100644
--- a/source/extensions/filters/http/grpc_json_transcoder/json_transcoder_filter.h
+++ b/source/extensions/filters/http/grpc_json_transcoder/json_transcoder_filter.h
@@ -12,6 +12,7 @@
 #include "source/common/protobuf/protobuf.h"
 #include "source/extensions/filters/http/grpc_json_transcoder/transcoder_input_stream_impl.h"
 
+#include "absl/synchronization/mutex.h"
 #include "google/api/http.pb.h"
 #include "grpc_transcoding/path_matcher.h"
 #include "grpc_transcoding/request_message_translator.h"
@@ -126,6 +127,7 @@ class JsonTranscoderConfig : public Logger::Loggable<Logger::Id::config>,
 
   Protobuf::DescriptorPool descriptor_pool_;
   google::grpc::transcoding::PathMatcherPtr<MethodInfoSharedPtr> path_matcher_;
+  mutable absl::Mutex type_helper_mutex_;
   std::unique_ptr<google::grpc::transcoding::TypeHelper> type_helper_;
   Protobuf::util::JsonPrintOptions print_options_;