CVE-2020-26264: Ethereum Go Ethereum

Medium severity, CVSS 6.5. EPSS: 1.9% chance of exploitation in the next 30 days.

Go Ethereum, or "Geth", is the official Golang implementation of the Ethereum protocol. In Geth before version 1.9.25 a denial-of-service vulnerability can make a LES server crash via malicious GetProofsV2 request from a connected LES client. This vulnerability only concerns users explicitly enabling les server; disabling les prevents the exploit. The vulnerability was patched in version 1.9.25.

Affected products

• Ethereum Go Ethereum: before 1.9.25 (fixed in 1.9.25)

Published 2020-12-11. Last modified 2026-06-17.