diff --git a/modules/dnn/src/net_impl.cpp b/modules/dnn/src/net_impl.cpp
index 28db8c0566..6684a4f7b0 100644
--- a/modules/dnn/src/net_impl.cpp
+++ b/modules/dnn/src/net_impl.cpp
@@ -1027,6 +1027,8 @@ void Net::Impl::forward(OutputArrayOfArrays outputBlobs,
         const std::vector<String>& outBlobNames)
 {
     CV_Assert(!empty());
+    if (outBlobNames.empty())
+        CV_Error(Error::StsBadArg, "in Net::forward(), outBlobNames cannot be empty");
     FPDenormalsIgnoreHintScope fp_denormals_ignore_scope;
 
     std::vector<LayerPin> pins;
@@ -1056,6 +1058,8 @@ void Net::Impl::forward(std::vector<std::vector<Mat>>& outputBlobs,
         const std::vector<String>& outBlobNames)
 {
     CV_Assert(!empty());
+    if (outBlobNames.empty())
+        CV_Error(Error::StsBadArg, "in Net::forward(), outBlobNames cannot be empty");
     FPDenormalsIgnoreHintScope fp_denormals_ignore_scope;
 
     std::vector<LayerPin> pins;
@@ -1316,6 +1320,9 @@ void Net::Impl::updateLayersShapes()
 
 LayerPin Net::Impl::getLatestLayerPin(const std::vector<LayerPin>& pins) const
 {
+    if (pins.empty())
+        CV_Error(Error::StsBadArg,
+                 "Cannot Net::Impl::getLatestLayerPin() from empty vector of pins");
     return *std::max_element(pins.begin(), pins.end());
 }