{"id":"CVE-2022-31172","aliases":["EUVD-2022-6227","GHSA-4g63-c64m-25w9"],"status":"published","title":"OpenZeppelin Contracts's SignatureChecker may revert on invalid EIP-1271 signers","description":"OpenZeppelin Contracts is a library for smart contract development. Versions 4.1.0 until 4.7.1 are vulnerable to the SignatureChecker reverting. `SignatureChecker.isValidSignatureNow` is not expected to revert. However, an incorrect assumption about Solidity 0.8's `abi.decode` allows some cases to revert, given a target contract that doesn't implement EIP-1271 as expected. The contracts that may be affected are those that use `SignatureChecker` to check the validity of a signature and handle invalid signatures in a way other than reverting. The issue was patched in version 4.7.1.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00503,"percentile":0.43344,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-20","CWE-347"],"published":"2022-07-21T13:55:11Z","modified":"2026-10-28T02:30:58Z","fixes":[{"ecosystem":"npm","package":"@openzeppelin/contracts","fixed_in":["4.7.1"],"sources":["ghsa","osv"]},{"ecosystem":"npm","package":"@openzeppelin/contracts-upgradeable","fixed_in":["4.7.1"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"@openzeppelin/contracts","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.1.0"},{"fixed":"4.7.1"}]}]},{"source":"ghsa","ecosystem":"npm","package":"@openzeppelin/contracts-upgradeable","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.1.0"},{"fixed":"4.7.1"}]}]},{"source":"osv","ecosystem":"npm","package":"@openzeppelin/contracts","ranges":[{"type":"SEMVER","events":[{"introduced":"4.1.0"},{"fixed":"4.7.1"}]}]},{"source":"osv","ecosystem":"npm","package":"@openzeppelin/contracts-upgradeable","ranges":[{"type":"SEMVER","events":[{"introduced":"4.1.0"},{"fixed":"4.7.1"}]}]}],"products":[{"vendor":"openzeppelin","product":"contracts"},{"vendor":"openzeppelin","product":"openzeppelin-contracts"}],"references":[{"url":"https://github.com/OpenZeppelin/openzeppelin-contracts/security/advisories/GHSA-4g63-c64m-25w9","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory","advisory","web"]},{"url":"https://github.com/OpenZeppelin/openzeppelin-contracts/pull/3552","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2022-31172","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-4g63-c64m-25w9"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/31xxx/CVE-2022-31172.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2022-31172","title":"OpenZeppelin Contracts's SignatureChecker may revert on invalid EIP-1271 signers","description":"OpenZeppelin Contracts is a library for smart contract development. Versions 4.1.0 until 4.7.1 are vulnerable to the SignatureChecker reverting. `SignatureChecker.isValidSignatureNow` is not expected to revert. However, an incorrect assumption about Solidity 0.8's `abi.decode` allows some cases to revert, given a target contract that doesn't implement EIP-1271 as expected. The contracts that may be affected are those that use `SignatureChecker` to check the validity of a signature and handle invalid signatures in a way other than reverting. The issue was patched in version 4.7.1.","status":"published","published":"2022-07-21T13:55:11Z","modified":"2025-04-23T17:57:33.239Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"cna"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:34:35.279735Z"}],"euvd":[{"id":"EUVD-2022-6227","description":"OpenZeppelin Contracts is a library for smart contract development. Versions 4.1.0 until 4.7.1 are vulnerable to the SignatureChecker reverting. `SignatureChecker.isValidSignatureNow` is not expected to revert. However, an incorrect assumption about Solidity 0.8's `abi.decode` allows some cases to revert, given a target contract that doesn't implement EIP-1271 as expected. The contracts that may be affected are those that use `SignatureChecker` to check the validity of a signature and handle invalid signatures in a way other than reverting. The issue was patched in version 4.7.1.","status":"published","published":"2022-07-21T13:55:11Z","modified":"2025-04-23T17:57:33Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T20:52:09.919052Z"}],"ghsa":[{"id":"GHSA-4g63-c64m-25w9","title":"OpenZeppelin Contracts's SignatureChecker may revert on invalid EIP-1271 signers","description":"### Impact\n\n`SignatureChecker.isValidSignatureNow` is not expected to revert. However, an incorrect assumption about Solidity 0.8's `abi.decode` allows some cases to revert, given a target contract that doesn't implement EIP-1271 as expected.\n\nThe contracts that may be affected are those that use `SignatureChecker` to check the validity of a signature and handle invalid signatures in a way other than reverting. We believe this to be unlikely.\n\n### Patches\n\nThe issue was patched in 4.7.1.\n\n### References\n\nhttps://github.com/OpenZeppelin/openzeppelin-contracts/pull/3552\n\n### For more information\n\nIf you have any questions or comments about this advisory, or need assistance deploying the fix, email us at [security@openzeppelin.com](mailto:security@openzeppelin.com).","status":"published","published":"2022-07-21T22:33:37Z","modified":"2023-01-27T05:07:10Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"cwes":["CWE-20","CWE-347"],"updated_at":"2026-11-02T14:36:21.8171Z"}],"nvd":[{"id":"CVE-2022-31172","description":"OpenZeppelin Contracts is a library for smart contract development. Versions 4.1.0 until 4.7.1 are vulnerable to the SignatureChecker reverting. `SignatureChecker.isValidSignatureNow` is not expected to revert. However, an incorrect assumption about Solidity 0.8's `abi.decode` allows some cases to revert, given a target contract that doesn't implement EIP-1271 as expected. The contracts that may be affected are those that use `SignatureChecker` to check the validity of a signature and handle invalid signatures in a way other than reverting. The issue was patched in version 4.7.1.","status":"published","published":"2022-07-22T04:15:14.633Z","modified":"2026-06-17T04:44:57.457Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"primary"}],"cwes":["CWE-20","CWE-347"],"updated_at":"2026-11-02T14:07:24.037422Z"}],"osv":[{"id":"CVE-2022-31172","title":"OpenZeppelin Contracts's SignatureChecker may revert on invalid EIP-1271 signers","description":"OpenZeppelin Contracts is a library for smart contract development. Versions 4.1.0 until 4.7.1 are vulnerable to the SignatureChecker reverting. `SignatureChecker.isValidSignatureNow` is not expected to revert. However, an incorrect assumption about Solidity 0.8's `abi.decode` allows some cases to revert, given a target contract that doesn't implement EIP-1271 as expected. The contracts that may be affected are those that use `SignatureChecker` to check the validity of a signature and handle invalid signatures in a way other than reverting. The issue was patched in version 4.7.1.","status":"published","published":"2022-07-21T13:55:11Z","modified":"2026-10-28T02:30:58.220318674Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T15:44:25.516981Z"},{"id":"GHSA-4g63-c64m-25w9","title":"OpenZeppelin Contracts's SignatureChecker may revert on invalid EIP-1271 signers","description":"### Impact\n\n`SignatureChecker.isValidSignatureNow` is not expected to revert. However, an incorrect assumption about Solidity 0.8's `abi.decode` allows some cases to revert, given a target contract that doesn't implement EIP-1271 as expected.\n\nThe contracts that may be affected are those that use `SignatureChecker` to check the validity of a signature and handle invalid signatures in a way other than reverting. We believe this to be unlikely.\n\n### Patches\n\nThe issue was patched in 4.7.1.\n\n### References\n\nhttps://github.com/OpenZeppelin/openzeppelin-contracts/pull/3552\n\n### For more information\n\nIf you have any questions or comments about this advisory, or need assistance deploying the fix, email us at [security@openzeppelin.com](mailto:security@openzeppelin.com).","status":"published","published":"2022-07-21T22:33:37Z","modified":"2023-11-08T04:09:28.648312Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"cwes":["CWE-20","CWE-347"],"updated_at":"2026-11-02T15:46:36.782754Z"}]}}