CVE-2020-26800: Ethereum Aleth

Medium severity, CVSS 5.5. EPSS: 1.2% chance of exploitation in the next 30 days.

A stack overflow vulnerability in Aleth Ethereum C++ client version <= 1.8.0 using a specially crafted a config.json file may result in a denial of service.

Affected products

• Ethereum Aleth: up to and including 1.8.0

Published 2021-01-11. Last modified 2026-06-17.