diff --git a/ion/src/main/java/com/fasterxml/jackson/dataformat/ion/IonParser.java b/ion/src/main/java/com/fasterxml/jackson/dataformat/ion/IonParser.java
index 8f21bdda4..94c0f7092 100644
--- a/ion/src/main/java/com/fasterxml/jackson/dataformat/ion/IonParser.java
+++ b/ion/src/main/java/com/fasterxml/jackson/dataformat/ion/IonParser.java
@@ -516,9 +516,11 @@ public JsonToken nextToken() throws IOException
         // also, when starting array/object, need to create new context
         if (_currToken == JsonToken.START_OBJECT) {
             _parsingContext = _parsingContext.createChildObjectContext(-1, -1);
+            streamReadConstraints().validateNestingDepth(_parsingContext.getNestingDepth());
             _reader.stepIn();
         } else if (_currToken == JsonToken.START_ARRAY) {
             _parsingContext = _parsingContext.createChildArrayContext(-1, -1);
+            streamReadConstraints().validateNestingDepth(_parsingContext.getNestingDepth());
             _reader.stepIn();
         }
 
diff --git a/protobuf/src/main/java/com/fasterxml/jackson/dataformat/protobuf/ProtobufParser.java b/protobuf/src/main/java/com/fasterxml/jackson/dataformat/protobuf/ProtobufParser.java
index 5dcc3b21e..58357d01b 100644
--- a/protobuf/src/main/java/com/fasterxml/jackson/dataformat/protobuf/ProtobufParser.java
+++ b/protobuf/src/main/java/com/fasterxml/jackson/dataformat/protobuf/ProtobufParser.java
@@ -584,6 +584,7 @@ public JsonToken nextToken() throws IOException
 
         case STATE_ARRAY_START:
             _parsingContext = _parsingContext.createChildArrayContext(_currentField);
+            streamReadConstraints().validateNestingDepth(_parsingContext.getNestingDepth());
             _state = STATE_ARRAY_VALUE_FIRST;
             return (_currToken = JsonToken.START_ARRAY);
 
@@ -601,6 +602,7 @@ public JsonToken nextToken() throws IOException
             }
             _currentEndOffset = newEnd;
             _parsingContext = _parsingContext.createChildArrayContext(_currentField, newEnd);
+            streamReadConstraints().validateNestingDepth(_parsingContext.getNestingDepth());
             _state = STATE_ARRAY_VALUE_PACKED;
             return (_currToken = JsonToken.START_ARRAY);
 
@@ -921,6 +923,7 @@ private JsonToken _readNextValue(FieldType t, int nextState) throws IOException
                 _currentEndOffset = newEnd;
                 _state = STATE_NESTED_KEY;
                 _parsingContext = _parsingContext.createChildObjectContext(msg, _currentField, newEnd);
+                streamReadConstraints().validateNestingDepth(_parsingContext.getNestingDepth());
                 _currentField = msg.firstField();
             }
             return JsonToken.START_OBJECT;