{"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":"OpenZeppelin Contracts is a library for secure smart contract development. The 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. The 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. The issue has been patched in 4.7.3.","published":"2022-08-14T00:05:09Z","modified":"2026-07-16T03:46:16.247995415Z","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"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-16T03:46:16.247995415Z"}}