CVE-2021-41121: Vyperlang Vyper

High severity, CVSS 8.8. EPSS: 1.1% chance of exploitation in the next 30 days.

Vyper is a Pythonic Smart Contract Language for the EVM. In affected versions when performing a function call inside a literal struct, there is a memory corruption issue that occurs because of an incorrect pointer to the the top of the stack. This issue has been resolved in version 0.3.0.

Affected products

• Vyperlang Vyper: before 0.3.0 (fixed in 0.3.0)

Published 2021-10-06. Last modified 2026-06-17.