# Safe Extensions audit contest Cantina · Safe modules and guards · 6th May 2024 · #2 A public audit contest on Cantina (Safe modules and guards), completed on 6th May 2024. 0xSimao placed #2. His findings from it are not published individually. ## What safe extensions is Safe is the standard smart-account stack, and its extension contracts are the modules that add functionality such as ERC-4337 support and allowances on top of the core Safe account. ## Scope The Safe extension contracts: the ERC-4337 module and the supporting modules over the core account. ## The contest [View the contest page](https://cantina.xyz/competitions/d47f8096-8858-437d-a9f5-2fe85ac9b95e)