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Puppy Raffle
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AI First Flight
Puppy Raffle
AI First Flight #1
Beginner Friendly
Foundry
Solidity
NFT
EXP
AI First Flight
EXP
Jun 6th, 2026 → Jun 6th, 2026
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5 / 5
Submissions
Severity
Validity
Tags
Author
#1
Reentrancy in refund() lets an attacker drain the entire contract balance (state updated after the external call)
High
Valid
[H-02] Reentrancy Vulnerabi...
bytethebuilder
#2
Weak on-chain randomness in selectWinner() lets anyone predict and control the winner and the NFT rarity
High
Valid
[H-03] Randomness can be gamed
bytethebuilder
#3
Unsafe uint64 cast and overflow of totalFees in selectWinner (Solidity 0.7.6) corrupts fee accounting and loses protocol fees
High
Valid
[H-05] Typecasting from uin...
bytethebuilder
#4
withdrawFees() requires balance == totalFees, so anyone can force-send wei to permanently brick fee withdrawals
Medium
Valid
[M-02] Slightly increasing ...
bytethebuilder
#5
enterRaffle's O(n^2) duplicate check causes unbounded gas growth, becoming a denial of service as the player count rises
Medium
Valid
[M-01] `PuppyRaffle: enterR...
bytethebuilder
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