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Vulnerability record · CVE-2021-39137 · published 24 August 2021

CVE-2021-39137: Go ethereum interpretation conflict vulnerability

Ethereum · Go Ethereum

go-ethereum is the official Go implementation of the Ethereum protocol. In affected versions a consensus-vulnerability in go-ethereum (Geth) could cause a chain split, where vulnerable versions refuse to accept the canonical chain. Further details about the vulnerability will be disclosed at a later date. A patch is included in the upcoming `v1.10.8` release. No workaround are available.

7.5 CVSS 3.1 High EPSS 1.3% · top 30.2% CWE-436 · Interpretation conflict
7.5CVSS 3.1 base score, v2 5.0
1.3%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

go-ethereum is the official Go implementation of the Ethereum protocol. In affected versions a consensus-vulnerability in go-ethereum (Geth) could cause a chain split, where vulnerable versions refuse to accept the canonical chain. Further details about the vulnerability will be disclosed at a later date. A patch is included in the upcoming `v1.10.8` release. No workaround are available.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/ethereum/go-ethereum/releases/tag/v1.10.8 Third Party Advisory
https://github.com/ethereum/go-ethereum/security/advisories/GHSA-9856-9gg9-qcmq Third Party Advisory
https://github.com/ethereum/go-ethereum/releases/tag/v1.10.8 Third Party Advisory
https://github.com/ethereum/go-ethereum/security/advisories/GHSA-9856-9gg9-qcmq Third Party Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2021-39137), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.