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
Aug 11th, 2026 → Aug 18th, 2026
View repo
View results
8 / 8
Submissions
Severity
Validity
Tags
Author
#1
Reentrancy in refund() allows draining the entire raffle balance
High
Valid
[H-02] Reentrancy Vulnerabi...
rodry957
#2
Predictable winner selection in selectWinner() allows an attacker to become the winner
High
Valid
[H-03] Randomness can be gamed
rodry957
#3
Refunded players leave address(0) holes that can permanently block selectWinner()
High
Valid
[H-04] `PuppyRaffle::refund...
rodry957
#4
Quadratic duplicate check in enterRaffle() allows permanent DoS by filling the player array
Medium
Valid
[M-01] `PuppyRaffle: enterR...
rodry957
#5
[High] Reentrancy en refund() permite drenar todos los fondos del contrato
High
Valid
[H-02] Reentrancy Vulnerabi...
rodry957
#6
[High] Randomness manipulable en selectWinner() — el atacante elige al ganador
High
Valid
[H-03] Randomness can be gamed
rodry957
#7
[Medium] selectWinner() puede elegir address(0) — raffle permanentemente atascado
High
Valid
[H-04] `PuppyRaffle::refund...
rodry957
#8
[Medium] enterRaffle() con check de duplicados O(n²) — DoS permanente por gas
Medium
Valid
[M-01] `PuppyRaffle: enterR...
rodry957
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!
