diff --git a/src/main/java/org/apache/commons/beanutils2/locale/converters/DecimalLocaleConverter.java b/src/main/java/org/apache/commons/beanutils2/locale/converters/DecimalLocaleConverter.java
index ab60b7d12..bf65ff511 100644
--- a/src/main/java/org/apache/commons/beanutils2/locale/converters/DecimalLocaleConverter.java
+++ b/src/main/java/org/apache/commons/beanutils2/locale/converters/DecimalLocaleConverter.java
@@ -20,6 +20,7 @@
 import java.text.DecimalFormat;
 import java.text.NumberFormat;
 import java.text.ParseException;
+import java.text.ParsePosition;
 import java.util.Locale;
 
 import org.apache.commons.beanutils2.ConversionException;
@@ -129,6 +130,12 @@ protected T parse(final Object value, final String pattern) throws ParseExceptio
             LOG.debug("No pattern provided, using default.");
         }
 
-        return (T) formatter.parse((String) value);
+        final String strValue = (String) value;
+        final ParsePosition pos = new ParsePosition(0);
+        final Number parsed = formatter.parse(strValue, pos);
+        if (parsed == null || pos.getErrorIndex() >= 0 || pos.getIndex() != strValue.length()) {
+            throw new ParseException("Error parsing '" + strValue + "' as a number", pos.getIndex());
+        }
+        return (T) parsed;
     }
 }
diff --git a/src/test/java/org/apache/commons/beanutils2/converters/DecimalLocaleConverterTest.java b/src/test/java/org/apache/commons/beanutils2/converters/DecimalLocaleConverterTest.java
new file mode 100644
index 000000000..ecfd87941
--- /dev/null
+++ b/src/test/java/org/apache/commons/beanutils2/converters/DecimalLocaleConverterTest.java
@@ -0,0 +1,67 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.commons.beanutils2.converters;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+import java.util.Locale;
+
+import org.apache.commons.beanutils2.ConversionException;
+import org.apache.commons.beanutils2.locale.converters.DecimalLocaleConverter;
+import org.apache.commons.beanutils2.locale.converters.IntegerLocaleConverter;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+/**
+ * Tests that {@link DecimalLocaleConverter} fully consumes its input and rejects trailing, unparsed characters.
+ */
+class DecimalLocaleConverterTest {
+
+    private Locale origLocale;
+
+    @BeforeEach
+    public void setUp() {
+        origLocale = Locale.getDefault();
+        Locale.setDefault(Locale.US);
+    }
+
+    @AfterEach
+    public void tearDown() {
+        Locale.setDefault(origLocale);
+    }
+
+    @Test
+    void testParseAcceptsGroupedNumber() {
+        final IntegerLocaleConverter converter = IntegerLocaleConverter.builder().setLocale(Locale.US).get();
+        assertEquals(Integer.valueOf(1234), converter.convert("1,234"));
+    }
+
+    @Test
+    void testParseRejectsTrailingCharacters() {
+        final IntegerLocaleConverter converter = IntegerLocaleConverter.builder().setLocale(Locale.US).get();
+        assertThrows(ConversionException.class, () -> converter.convert("123abc"));
+    }
+
+    @Test
+    void testParseRejectsTrailingExpression() {
+        final IntegerLocaleConverter converter = IntegerLocaleConverter.builder().setLocale(Locale.US).get();
+        assertThrows(ConversionException.class, () -> converter.convert("42 OR 1=1"));
+    }
+}