{"id":"CVE-2022-35961","aliases":["GHSA-4h98-2769-gh6h"],"url":"https://o3.security/vulnerability/CVE-2022-35961","summary":"ECDSA signature malleability in OpenZeppelin Contracts","details":"### Impact\n\nThe functions `ECDSA.recover` and `ECDSA.tryRecover` are vulnerable to a kind of signature malleability due to accepting EIP-2098 compact signatures in addition to the traditional 65 byte signature format. This is only an issue for the functions that take a single `bytes` argument, and not the functions that take `r, v, s` or `r, vs` as separate arguments.\n\nThe potentially affected contracts are those that implement signature reuse or replay protection by marking the signature itself as used rather than the signed message or a nonce included in it. A user may take a signature that has already been submitted, submit it again in a different form, and bypass this protection.\n\n### Patches\n\nThe issue has been patched in 4.7.3.\n\n\n### For more information\n\nIf you have any questions or comments about this advisory, or need assistance deploying a fix, email us at [security@openzeppelin.com](mailto:security@openzeppelin.com).\n","published":"2022-08-14T00:05:09Z","modified":"2026-08-12T03:51:42.138664455Z","cvss":{"score":7.9,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:L"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"@openzeppelin/contracts","fixedVersion":"4.7.3"},{"ecosystem":"npm","name":"@openzeppelin/contracts-upgradeable","fixedVersion":"4.7.3"}],"fix":{"url":"https://github.com/OpenZeppelin/openzeppelin-contracts/pull/3610","label":"OpenZeppelin/openzeppelin-contracts#3610"},"references":[{"type":"WEB","url":"https://github.com/OpenZeppelin/openzeppelin-contracts/releases/tag/v4.7.3"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/35xxx/CVE-2022-35961.json"},{"type":"ADVISORY","url":"https://github.com/OpenZeppelin/openzeppelin-contracts/security/advisories/GHSA-4h98-2769-gh6h"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-35961"},{"type":"FIX","url":"https://github.com/OpenZeppelin/openzeppelin-contracts/pull/3610"},{"type":"WEB","url":"https://github.com/OpenZeppelin/openzeppelin-contracts/commit/d693d89d99325f395182e4f547dbf5ff8e5c3c87"},{"type":"PACKAGE","url":"https://github.com/OpenZeppelin/openzeppelin-contracts"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:42.138664455Z"}}