diff --git a/binding/form_mapping.go b/binding/form_mapping.go
index 33389b28..0ecdea6b 100644
--- a/binding/form_mapping.go
+++ b/binding/form_mapping.go
@@ -18,7 +18,8 @@ import (
 )
 
 var (
-	errUnknownType = errors.New("unknown type")
+	errUnknownType      = errors.New("unknown type")
+	errRecursionTooDeep = errors.New("recursion too deep")
 
 	// ErrConvertMapStringSlice can not convert to map[string][]string
 	ErrConvertMapStringSlice = errors.New("can not convert to map slices of strings")
@@ -75,14 +76,18 @@ func (form formSource) TrySet(value reflect.Value, field reflect.StructField, ta
 }
 
 func mappingByPtr(ptr any, setter setter, tag string) error {
-	_, err := mapping(reflect.ValueOf(ptr), emptyField, setter, tag)
+	_, err := mapping(reflect.ValueOf(ptr), emptyField, setter, tag, 0)
 	return err
 }
 
-func mapping(value reflect.Value, field reflect.StructField, setter setter, tag string) (bool, error) {
+func mapping(value reflect.Value, field reflect.StructField, setter setter, tag string, deepth int) (bool, error) {
 	if field.Tag.Get(tag) == "-" { // just ignoring this field
 		return false, nil
 	}
+	if deepth >= 1000 {
+		// avoid causing stackoverflow.
+		return false, errRecursionTooDeep
+	}
 
 	vKind := value.Kind()
 
@@ -93,7 +98,7 @@ func mapping(value reflect.Value, field reflect.StructField, setter setter, tag
 			isNew = true
 			vPtr = reflect.New(value.Type().Elem())
 		}
-		isSet, err := mapping(vPtr.Elem(), field, setter, tag)
+		isSet, err := mapping(vPtr.Elem(), field, setter, tag, deepth+1)
 		if err != nil {
 			return false, err
 		}
@@ -122,7 +127,7 @@ func mapping(value reflect.Value, field reflect.StructField, setter setter, tag
 			if sf.PkgPath != "" && !sf.Anonymous { // unexported
 				continue
 			}
-			ok, err := mapping(value.Field(i), sf, setter, tag)
+			ok, err := mapping(value.Field(i), sf, setter, tag, deepth+1)
 			if err != nil {
 				return false, err
 			}
diff --git a/binding/form_mapping_test.go b/binding/form_mapping_test.go
index afd51f9d..b39f30eb 100644
--- a/binding/form_mapping_test.go
+++ b/binding/form_mapping_test.go
@@ -58,7 +58,7 @@ func TestMappingBaseTypes(t *testing.T) {
 
 		field := val.Elem().Type().Field(0)
 
-		_, err := mapping(val, emptyField, formSource{field.Name: {tt.form}}, "form")
+		_, err := mapping(val, emptyField, formSource{field.Name: {tt.form}}, "form", 0)
 		assert.NoError(t, err, testName)
 
 		actual := val.Elem().Field(0).Interface()
@@ -318,6 +318,16 @@ func TestMappingMapField(t *testing.T) {
 	assert.Equal(t, map[string]int{"one": 1}, s.M)
 }
 
+func TestMappingCircularRef(t *testing.T) {
+	type S struct {
+		S *S `form:"s"`
+	}
+	var s S
+
+	err := mappingByPtr(&s, formSource{}, "form")
+	assert.ErrorIs(t, err, errRecursionTooDeep)
+}
+
 func TestMappingIgnoredCircularRef(t *testing.T) {
 	type S struct {
 		S *S `form:"-"`