diff --git a/pkg/handler/post_test.go b/pkg/handler/post_test.go
index cd5aba63..a5cd6b9d 100644
--- a/pkg/handler/post_test.go
+++ b/pkg/handler/post_test.go
@@ -599,6 +599,48 @@ func TestPost(t *testing.T) {
 				},
 			}).Run(handler, t)
 		})
+
+		SubTest(t, "RejectAccessConcat", func(t *testing.T, store *MockFullDataStore, composer *StoreComposer) {
+			ctrl := gomock.NewController(t)
+			defer ctrl.Finish()
+			uploadA := NewMockFullUpload(ctrl)
+			uploadB := NewMockFullUpload(ctrl)
+
+			gomock.InOrder(
+				store.EXPECT().GetUpload(gomock.Any(), "a").Return(uploadA, nil),
+				uploadA.EXPECT().GetInfo(gomock.Any()).Return(FileInfo{
+					ID:     "a",
+					Offset: 5,
+					Size:   5,
+				}, nil),
+
+				store.EXPECT().GetUpload(gomock.Any(), "b").Return(uploadB, nil),
+				uploadB.EXPECT().GetInfo(gomock.Any()).Return(FileInfo{
+					ID:     "b",
+					Offset: 10,
+					Size:   10,
+				}, nil),
+			)
+
+			handler, _ := NewHandler(Config{
+				StoreComposer: composer,
+				BasePath:      "/files/",
+				PreUploadCreateCallback: func(event HookEvent) (HTTPResponse, FileInfoChanges, error) {
+					return HTTPResponse{}, FileInfoChanges{}, ErrAccessRejectedByServer
+				},
+			})
+
+			(&httpTest{
+				Method: "POST",
+				ReqHeader: map[string]string{
+					"Tus-Resumable": "1.0.0",
+					"Upload-Concat": "final;http://tus.io/files/a http://tus.io/files/b",
+				},
+				Code:      ErrAccessRejectedByServer.HTTPResponse.StatusCode,
+				ResHeader: ErrAccessRejectedByServer.HTTPResponse.Header,
+				ResBody:   ErrAccessRejectedByServer.HTTPResponse.Body,
+			}).Run(handler, t)
+		})
 	})
 
 	SubTest(t, "ExperimentalProtocol", func(t *testing.T, _ *MockFullDataStore, _ *StoreComposer) {
diff --git a/pkg/handler/unrouted_handler.go b/pkg/handler/unrouted_handler.go
index 3807b4cc..a151b81e 100644
--- a/pkg/handler/unrouted_handler.go
+++ b/pkg/handler/unrouted_handler.go
@@ -293,6 +293,7 @@ func (handler *UnroutedHandler) PostFile(w http.ResponseWriter, r *http.Request)
 	var size int64
 	var sizeIsDeferred bool
 	var partialUploads []Upload
+	var partialFileInfos []FileInfo
 	if isFinal {
 		// A final upload must not contain a chunk within the creation request
 		if containsChunk {
@@ -300,7 +301,7 @@ func (handler *UnroutedHandler) PostFile(w http.ResponseWriter, r *http.Request)
 			return
 		}
 
-		partialUploads, size, err = handler.sizeOfUploads(c, partialUploadIDs)
+		partialUploads, partialFileInfos, size, err = handler.sizeOfUploads(c, partialUploadIDs)
 		if err != nil {
 			handler.sendError(c, err)
 			return
@@ -339,7 +340,8 @@ func (handler *UnroutedHandler) PostFile(w http.ResponseWriter, r *http.Request)
 	}
 
 	if handler.config.PreUploadCreateCallback != nil {
-		resp2, changes, err := handler.config.PreUploadCreateCallback(newHookEvent(c, &info, nil))
+		access := newAccessInfo(AccessModeRead, partialFileInfos)
+		resp2, changes, err := handler.config.PreUploadCreateCallback(newHookEvent(c, &info, &access))
 		if err != nil {
 			handler.sendError(c, err)
 			return
@@ -1310,27 +1312,29 @@ func getHostAndProtocol(r *http.Request, allowForwarded bool) (host, proto strin
 // The get sum of all sizes for a list of upload ids while checking whether
 // all of these uploads are finished yet. This is used to calculate the size
 // of a final resource.
-func (handler *UnroutedHandler) sizeOfUploads(ctx context.Context, ids []string) (partialUploads []Upload, size int64, err error) {
+func (handler *UnroutedHandler) sizeOfUploads(ctx context.Context, ids []string) (partialUploads []Upload, partialFileInfos []FileInfo, size int64, err error) {
 	partialUploads = make([]Upload, len(ids))
+	partialFileInfos = make([]FileInfo, len(ids))
 
 	for i, id := range ids {
 		upload, err := handler.composer.Core.GetUpload(ctx, id)
 		if err != nil {
-			return nil, 0, err
+			return nil, nil, 0, err
 		}
 
 		info, err := upload.GetInfo(ctx)
 		if err != nil {
-			return nil, 0, err
+			return nil, nil, 0, err
 		}
 
 		if info.SizeIsDeferred || info.Offset != info.Size {
 			err = ErrUploadNotFinished
-			return nil, 0, err
+			return nil, nil, 0, err
 		}
 
 		size += info.Size
 		partialUploads[i] = upload
+		partialFileInfos[i] = info
 	}
 
 	return