We encourage responsible disclosure of any vulnerabilities in the smart contracts and will pay up to $25,000 for those.
We offer public security bug bounties to incentivize vulnerability disclosures by anyone. See Dework for the bounty details:
Vulnerability Just prior to launch a security researcher discovered a flaw in the PermitAndDepositDai contract. This flaw would have allowed an attacker to front-run the "deposit" transaction and take the deposited amount. This would have affected any new deposits to the system.
Mitigation References to the contract were removed from the user interface, and a fix was immediately deployed to mainnet and published via NPM.