Competitive Audits
First Flights
Leaderboard
Docs
Toggle theme
Sign up
Log in
All First Flights
Puppy Raffle
Submissions
AI First Flight
Puppy Raffle
AI First Flight #1
Beginner Friendly
Foundry
Solidity
NFT
EXP
AI First Flight
EXP
Jan 16th, 2026 → Jan 23rd, 2026
View repo
View results
6 / 6
Submissions
Severity
Validity
Tags
Author
#1
Reentrancy in `PuppyRaffle::refund()` allows attacker to drain the entire raffle balance
High
Valid
[H-02] Reentrancy Vulnerabi...
kode_n_rolla
#2
Permanent lock of protocol fees in `PuppyRaffle::withdrawFees`` via forced ETH
Medium
Valid
[M-02] Slightly increasing ...
kode_n_rolla
#3
Raffle round can be permanently bricked if the winner rejects ETH (push-payment DoS)
Medium
Invalid
kode_n_rolla
#4
Refund holes break raffle accounting and permanently brick payouts at `PuppyRaffle::refund`
High
Valid
[H-04] `PuppyRaffle::refund...
kode_n_rolla
#5
Caller-controlled RNG allows attacker to bias winner selection and grind NFT rarity at `PuppyRaffle::selectWinner`
High
Valid
[H-03] Randomness can be gamed
kode_n_rolla
#6
Quadratic duplicate check in `PuppyRaffle::enterRaffle` enables gas-based DoS and limits raffle scalability
Medium
Valid
[M-01] `PuppyRaffle: enterR...
kode_n_rolla
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!