--- /Base64.java	2023-07-05 03:13:02.434026039 +0200
+++ /Codec-1/src/java/org/apache/commons/codec/binary/Base64.java	2023-07-05 03:13:02.434026039 +0200
@@ -420,7 +420,7 @@
 
         for (int i = 0; i < numberQuadruple; i++) {
             dataIndex = i * 4;
-            marker0 = base64Data[dataIndex + 2];
+marker0 = base64Data[dataIndex + ];
             marker1 = base64Data[dataIndex + 3];
 
             b1 = base64Alphabet[base64Data[dataIndex]];
