CVE-2020-37289
LOW
NVD
CVSS Score
3.7
Severity
LOW
Published
Oct 21, 2026
Vendor
unknown
Description
Vyper before 0.3.1 lacks a uint8 type, allowing interface return values declared as uint8, such as ERC20.decimals(), to be stored in uint256 variables without bounds checking. Malicious contracts can return values greater than 255 to manipulate or bypass contract logic that relies on these values.