{"id":"CVE-2020-26242","aliases":["GHSA-jm5c-rv3w-w83m","GO-2021-0103"],"url":"https://o3.security/vulnerability/CVE-2020-26242","summary":"Denial of service in geth","details":"Go Ethereum, or \"Geth\", is the official Golang implementation of the Ethereum protocol. In Geth before version 1.9.18, there is a Denial-of-service (crash) during block processing. This is fixed in 1.9.18.","published":"2020-11-25T02:15:11.127Z","modified":"2026-08-07T15:12:16.425667Z","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":null,"affectedPackages":[{"ecosystem":"Go","name":"github.com/ethereum/go-ethereum","fixedVersion":"1.9.18"},{"ecosystem":"Go","name":"github.com/holiman/uint256","fixedVersion":"1.1.1"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://blog.ethereum.org/2020/11/12/geth_security_release/"},{"type":"ADVISORY","url":"https://github.com/ethereum/go-ethereum/security/advisories/GHSA-jm5c-rv3w-w83m"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T15:12:16.425667Z"}}