CVE-2024-32647

Vyper is a pythonic Smart Contract Language for the Ethereum virtual machine. In versions 0.3.10 and prior, using the create_from_blueprint builtin can result in a double eval vulnerability when raw_args=True and the args argument has side-effects. It can be seen that the _build_create_IR function of the create_from_blueprint builtin doesn’t cache the mentioned args argument to the stack. As such, it can be evaluated multiple times (instead of retrieving the value from the stack). No vulnerable production contracts were found. Additionally, double evaluation of side-effects should be easily discoverable in client tests. As such, the impact is low. As of time of publication, no fixed versions exist.