A AegiFlow
MEDIUMCVSS 6.3

CVE-2020-37289

CVE-2020-37289 updated by NVD

Modified
2026-10-30
Sources
nvd

Summary

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.

References

Includes data from the National Vulnerability Database (NIST). NVD data is in the public domain; this page is not endorsed by NIST.

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