CVE-2026-26313: Go Ethereum affected by DoS via malicious p2p message

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-02-19 · updated 2026-06-17
Weakness: CWE-770

Description

go-ethereum (geth) is a golang execution layer implementation of the Ethereum protocol. Prior to version 1.17.0, an attacker can cause high memory usage by sending a specially-crafted p2p message. The issue is resolved in the v1.17.0 release.

Affected products

ethereum go-ethereum: before 1.17.0 — fixed in 1.17.0

How to fix

Upgrade to a fixed version: ethereum go-ethereum 1.17.0. Check the vendor advisory for mitigations.

References

https://github.com/ethereum/go-ethereum/releases/tag/v1.17.0
https://github.com/ethereum/go-ethereum/security/advisories/GHSA-689v-6xwf-5jf3

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