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
Sep 25th, 2026 → Sep 28th, 2026
View repo
View results
7 / 7
Submissions
Severity
Validity
Tags
Author
#1
Predictable Randomness in selectWinner() Allows Attacker to Always Win the Raffle
High
Valid
[H-03] Randomness can be gamed
slientj
#2
Unbounded Nested Loop in PuppyRaffle::enterRaffle Causes Denial of Service as Players Grow
Medium
Valid
[M-01] `PuppyRaffle: enterR...
slientj
#3
Dangerous Strict Equality in withdrawFees() Allows Attacker to Permanently Block Fee Withdrawal
Medium
Valid
[M-02] Slightly increasing ...
slientj
#4
Reentrancy in PuppyRaffle::refund Allows Attacker to Drain Contract Funds
High
Valid
[H-02] Reentrancy Vulnerabi...
slientj
#5
Missing Zero-Address Check in changeFeeAddress() Can Permanently Lock All Fees
High
Valid
[H-01] Potential Loss of Fu...
slientj
#6
Refunded Players Leave Empty Slots in players Array, Causing selectWinner to Revert and Prize to Be Locked
High
Valid
[H-04] `PuppyRaffle::refund...
slientj
#7
Integer Overflow in totalFees Accumulation Permanently Blocks withdrawFees()
High
Valid
[H-05] Typecasting from uin...
slientj
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!
