{"id":"CVE-2021-39137","aliases":["GHSA-9856-9gg9-qcmq","GO-2022-0254"],"url":"https://o3.security/vulnerability/CVE-2021-39137","summary":"Ethereum Contains Consensus Flaw During Block Processing","details":"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.","published":"2021-08-24T16:15:11.007Z","modified":"2026-08-07T16:57:36.340191Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/ethereum/go-ethereum","fixedVersion":"1.10.8"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/ethereum/go-ethereum/releases/tag/v1.10.8"},{"type":"ADVISORY","url":"https://github.com/ethereum/go-ethereum/security/advisories/GHSA-9856-9gg9-qcmq"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T16:57:36.340191Z"}}