What is CVE-2026-26313?

CVE-2026-26313 is a high-severity vulnerability in Ethereum Go-Ethereum, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-02-19.

How severe is CVE-2026-26313?

High severity. CVSS v3 base score is 7.5 out of 10.

Resource exhaustion in Ethereum Go-Ethereum

CVE-2026-26313

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.

Published 2026-02-19 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.006 (47.8th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 47.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: +0.000

Affected products

Ethereum Go-Ethereum — versions < 1.17.0
Ethereum Go

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

github.com/ethereum/go-ethereum/security/advisories/GHSA-689v-6xwf-5jf3 (Vendor Advisory)
github.com/ethereum/go-ethereum/releases/tag/v1.17.0 (Release Notes)

Frequently asked questions

What is CVE-2026-26313?: CVE-2026-26313 is a high-severity vulnerability in Ethereum Go-Ethereum, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-02-19.
How severe is CVE-2026-26313?: High severity. CVSS v3 base score is 7.5 out of 10.