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
Apr 26th, 2026 → Apr 26th, 2026
View repo
View results
5 / 5
Submissions
Severity
Validity
Tags
Author
#1
refund() is reentrant and allows repeated withdrawals for a single ticket
High
Valid
[H-02] Reentrancy Vulnerabi...
sonicthealpha
#2
Refunded entries remain in players, corrupting winner selection and fee accounting
High
Valid
[H-04] `PuppyRaffle::refund...
sonicthealpha
#3
Predictable on-chain randomness lets callers bias both the winner and NFT rarity
High
Valid
[H-03] Randomness can be gamed
sonicthealpha
#4
totalFees uses an unsafe uint64 accumulator and can overflow, locking protocol fees
High
Valid
[H-05] Typecasting from uin...
sonicthealpha
#5
Quadratic duplicate detection enables gas-based denial of service on raffle entry
Medium
Valid
[M-01] `PuppyRaffle: enterR...
sonicthealpha
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!
