{"cve":"CVE-2021-39137","nvd":{"published":"2021-08-24T16:15:11.007","modified":"2026-06-17T04:03:08.417","status":"Modified","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_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-436"],"references":["https://github.com/ethereum/go-ethereum/releases/tag/v1.10.8","https://github.com/ethereum/go-ethereum/security/advisories/GHSA-9856-9gg9-qcmq","https://github.com/ethereum/go-ethereum/releases/tag/v1.10.8","https://github.com/ethereum/go-ethereum/security/advisories/GHSA-9856-9gg9-qcmq"],"products":["ethereum:go_ethereum"],"source":"nvd","synced_at":"2026-10-19T21:21:57.125947417+00:00"},"epss":{"cve":"CVE-2021-39137","score":0.01325,"percentile":0.70965,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-9856-9gg9-qcmq","url":"https://osv.dev/vulnerability/GHSA-9856-9gg9-qcmq","summary":"Ethereum Contains Consensus Flaw During Block Processing","modified":"2026-07-08T06:29:39.134531916Z","packages":[{"ecosystem":"Go","name":"github.com/ethereum/go-ethereum","purl":"pkg:golang/github.com/ethereum/go-ethereum","ranges":[">=1.10.0 <1.10.8"],"fixed":["1.10.8"]}]},{"id":"GO-2022-0254","url":"https://osv.dev/vulnerability/GO-2022-0254","summary":"Consensus flaw during block processing in github.com/ethereum/go-ethereum","modified":"2024-05-20T16:03:47Z","packages":[{"ecosystem":"Go","name":"github.com/ethereum/go-ethereum","purl":"pkg:golang/github.com/ethereum/go-ethereum","ranges":["<1.10.8"],"fixed":["1.10.8"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}