Tue Sep 22 2020 14:39:17 UTC
It's not a bug. It's an undocumented feature.
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ID Product Comp Assignee Status Resolution Summary Changed
57161 POI HSSF dev RESO DUPL Add a warning against opening Excel file with WorkbookFactory.create(File) 2016-04-05
One bug found.

as

File a new bug in the "HSSF" component of the "POI" product