DuplicateItemsInUniqueArraysFields

This fuzzer targets arrays declared with uniqueItems: true. It replaces the array with a value containing a duplicate item and checks whether the service rejects the invalid request instead of silently accepting duplicate values.

Select it with:

cats -c openapi.yml -s http://localhost:8080 \
  --fuzzers=DuplicateItemsInUniqueArraysFields