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
Jul 22nd, 2026 → Jul 24th, 2026
View repo
View results
6 / 6
Submissions
Severity
Validity
Tags
Author
#1
Unprotected `Snowman::mintSnowman` lets anyone mint unlimited NFTs for free
High
Valid
[H-01] Unrestricted NFT Min...
codebycinar
#2
`SnowmanAirdrop::claimSnowman` has no one-time-claim enforcement (dead `s_hasClaimedSnowman`) and no signature nonce, allowing repeat claims
Low
Valid
[L-01] Missing Claim Status...
codebycinar
#3
Airdrop amount is read from live `balanceOf` instead of the Merkle snapshot, locking out any receiver whose balance changed
Medium
Valid
[M-01] DoS to a user trying...
codebycinar
#4
`Snow` uses a single global `s_earnTimer`, so one user's earn/buy blocks everyone else's free weekly `earnSnow`
Low
Valid
[L-02] Global Timer Reset i...
codebycinar
#5
Unprotected `Snowman::mintSnowman` lets anyone mint unlimited NFTs for free
High
Valid
[H-01] Unrestricted NFT Min...
codebycinar
#6
`SnowmanAirdrop::claimSnowman` has no one-time-claim enforcement (dead `s_hasClaimedSnowman`) and no signature nonce, allowing repeat claims
Low
Valid
[L-01] Missing Claim Status...
codebycinar
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!
