CVE-2026-26313

Go Ethereum affected by DoS via malicious p2p message

State: Published
Severity: 6.9 Medium
Published: Feb 19, 2026
Updated: Feb 20, 2026
Reserved: Feb 13, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	6.9 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N	GitHub_M

Weaknesses

CWE-770 Allocation of Resources Without Limits or Throttling

Affected Products

Product	Versions
go-ethereumethereum	< 1.17.0Affected

References

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

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