We uncover that the Ethereum ABI specification was written loosely in parts, leading to potentially vulnerable implementations that can be exploited to cause denial-of-service (DoS) conditions in eth_abi (Python), ethabi (Rust), alloy-rs and ethereumjs-abi, posing a risk to the availability of blockchain platforms. We will try to decode this payload using the ABI schemata ()[] and uint32[0][] using several different Ethereum ABI parsing libraries. Also, any off-chain software fetching and decoding data from contracts could be vulnerable to this bug if it allows users to specify ABI types.