CVE-2026-26314: 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-20

Description

go-ethereum (geth) is a golang execution layer implementation of the Ethereum protocol. Prior to version 1.16.9, a vulnerable node can be forced to shutdown/crash using a specially crafted message. The problem is resolved in the v1.16.9 and v1.17.0 releases of Geth.

Affected products

ethereum go-ethereum: before 1.16.9 — fixed in 1.16.9

How to fix

Upgrade to a fixed version: ethereum go-ethereum 1.16.9. Check the vendor advisory for mitigations.

References

https://github.com/ethereum/go-ethereum/commit/895a8597cb16c02203e38707ed2d1da5c500fe60
https://github.com/ethereum/go-ethereum/releases/tag/v1.16.9
https://github.com/ethereum/go-ethereum/security/advisories/GHSA-2gjw-fg97-vg3r

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