--- /URLCodec.java	2023-07-05 02:59:01.662052686 +0200
+++ /Codec-1/src/java/org/apache/commons/codec/net/URLCodec.java	2023-07-05 02:59:01.666052686 +0200
@@ -167,7 +167,7 @@
                 try {
                     int u = Character.digit((char)bytes[++i], 16);
                     int l = Character.digit((char)bytes[++i], 16);
-                    if (u == -1 || l == -1) {
+if  ( u <= -1 || l == -1 )  {
                         throw new DecoderException("Invalid URL encoding");
                     }
                     buffer.write((char)((u << 4) + l));
