This means that Zip bombs could only reach their true compression potential recursively.
Interestingly, Fifield found a way to get around this limitation.
This article shows how to construct a non-recursive zip bomb whose compression ratio surpasses the DEFLATE limit of 1032.
While bulk_deflate outdoes these solutions, he notes that it isnt as effective in general use-cases.
With ZIP64, it is possible to develop a zip bomb of effectively infinite length.
source: www.techworm.net