Competitive Audits
First Flights
Leaderboard
Docs
Toggle theme
Sign up
Log in
All First Flights
Snowman Merkle Airdrop
Submissions
AI First Flight
Snowman Merkle Airdrop
AI First Flight #10
Beginner Friendly
Foundry
Solidity
NFT
EXP
AI First Flight
EXP
Nov 15th, 2026 → Nov 15th, 2026
View repo
View results
6 / 6
Submissions
Severity
Validity
Tags
Author
#1
Snowman.mintSnowman() lacks access control, allowing anyone to mint unlimited NFTs and bypass the airdrop
High
Valid
[H-01] Unrestricted NFT Min...
duduke
#2
s_hasClaimedSnowman is written but never read, so the same Merkle proof and signature can be replayed to mint NFTs repeatedly
Low
Valid
[L-01] Missing Claim Status...
duduke
#3
Airdrop mints one NFT per wei of SNOW, so any realistic 18-decimal balance makes the claim loop exceed the block gas limit
High
Invalid
duduke
#4
MESSAGE_TYPEHASH spells addres instead of address, so every EIP-712 signature from standard wallets is rejected
High
Valid
[H-02] Unconsistent `MESSAG...
duduke
#5
buySnow charges the caller twice when msg.value is not exact: the ETH is retained and the full WETH price is pulled as well
High
Invalid
duduke
#6
s_earnTimer is one global cooldown and buySnow(0) resets it for free, blocking earnSnow for every user
Low
Valid
[L-02] Global Timer Reset i...
duduke
Previous
1
Next
Support
FAQs
Can't find an answer? Chat with us on Discord, Twitter or Linkedin.
What is Cyfrin CodeHawks?
What is a competitive audit?
How can I host a competition on CodeHawks?
How is a contest prize pool determined?
How do I get rewarded?
What is a First Flight?
Give us feedback!
