garydgregory commented on PR #801:
URL: https://github.com/apache/commons-io/pull/801#issuecomment-3413475931

   > Do you happen to recall the rationale behind commit 
https://github.com/apache/commons-io/commit/c9089843e92bf74180ac7967ef9099c29784f1af,
 which zeroes out the per-thread buffers before each use?
   
   I think there was a concern that in a multi-tenant server/application, when 
multiple applications are served (sequentially, or not) on reused threads, one 
app might be able to read data written by a different app, creating a security 
issue.
   


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