CVE-2024-24564: Vyperlang Vyper

Medium severity, CVSS 5.3. EPSS: 0.6% chance of exploitation in the next 30 days.

Vyper is a pythonic Smart Contract Language for the ethereum virtual machine. When using the built-in `extract32(b, start)`, if the `start` index provided has for side effect to update `b`, the byte array to extract `32` bytes from, it could be that some dirty memory is read and returned by `extract32`. This vulnerability is fixed in 0.4.0.

Affected products

• Vyperlang Vyper: before 0.4.0 (fixed in 0.4.0)

Published 2024-02-26. Last modified 2026-06-17.