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 25th, 2026 → Jul 25th, 2026
View repo
View results
6 / 6
Submissions
Severity
Validity
Tags
Author
#1
Missing access control on `Snowman::mintSnowman` lets anyone mint unlimited Snowman NFTs, bypassing the airdrop entirely
High
Valid
[H-01] Unrestricted NFT Min...
augustwh11
#2
`s_hasClaimedSnowman` is written but never read, letting a whitelisted address replay the identical proof and signature for unlimited NFTs
Low
Valid
[L-01] Missing Claim Status...
augustwh11
#3
Snow::s_earnTimer` is a single global slot that `buySnow(0)` resets for free, letting anyone deny free farming to every user permanently
Low
Valid
[L-02] Global Timer Reset i...
augustwh11
#4
`claimSnowman` rebuilds the Merkle leaf from the live Snow balance instead of the committed amount, so eligible users lose their claim by farming as the protocol instructs
Medium
Valid
[M-01] DoS to a user trying...
augustwh11
#5
Malformed EIP-712 typehash (`addres` plus stray whitespace) makes every signature produced by standard wallet tooling invalid, blocking the claim flow
High
Valid
[H-02] Unconsistent `MESSAG...
augustwh11
#6
`Snow::buySnow` treats any mismatched `msg.value` as a WETH purchase, charging the user in both assets and keeping the ETH with no refund
Low
Invalid
augustwh11
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!
