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Medium 5.3
`codeq`: decoding untrusted input can allocate memory from an unchecked length prefix (denial of service)
`codeq` is a serialization library whose `Decode` trait reads length-prefixed values. For `String` and `Vec<u8>`, the length-prefixed `Decode` implementations read a 4-byte big-endian length and allocate a buffer of that size **before** reading the payload. B…