GitHub, Inc. AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

GitHub, Inc. CWE-20

Vyper is a pythonic Smart Contract Language for the Ethereum virtual machine. In versions 0.3.10 and prior, using the `slice` builtin can result in a double eval vulnerability when the buffer argument is either `msg.data`, `self.code` or `<address>.code` and either the `start` or `length` arguments have side-effects. It can be easily triggered only with the versions `<0.3.4` as `0.3.4` introduced the unique symbol fence. 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 are available.

GitHub, Inc. https://github.com/vyperlang/vyper/security/advisories/GHSA-r56x-j438-vw5m [No types assigned]