arthurscchan opened a new pull request, #222:
URL: https://github.com/apache/commons-codec/pull/222

   This fixes a possible IndexOutOfBoundsException in 
[src/main/java/org/apache/commons/codec/net/PercentCodec.java](https://github.com/apache/commons-codec/blob/master/src/main/java/org/apache/commons/codec/net/PercentCodec.java)
   
   This PR adds a conditional check to ensure only valid bytes (positive or 
zero) are processed.
   
   We found this bug using fuzzing by way of OSS-Fuzz. It is reported at 
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=64362.


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