{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-06-25T02:31:38.740","vulnerabilities":[{"cve":{"id":"CVE-2021-41264","sourceIdentifier":"security-advisories@github.com","published":"2021-11-12T18:15:07.733","lastModified":"2026-06-17T04:08:11.910","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"OpenZeppelin Contracts is a library for smart contract development. In affected versions upgradeable contracts using `UUPSUpgradeable` may be vulnerable to an attack affecting uninitialized implementation contracts. A fix is included in version 4.3.2 of `@openzeppelin/contracts` and `@openzeppelin/contracts-upgradeable`. For users unable to upgrade; initialize implementation contracts using `UUPSUpgradeable` by invoking the initializer function (usually called `initialize`). An example is provided [in the forum](https://forum.openzeppelin.com/t/security-advisory-initialize-uups-implementation-contracts/15301)."},{"lang":"es","value":"OpenZeppelin Contracts es una biblioteca para el desarrollo de contratos inteligentes. En las versiones afectadas, los contratos actualizables que usan \"UUPSUpgradeable\" pueden ser vulnerables a un ataque que afecta a los contratos de implementación no inicializada. Se incluye una corrección en la versión 4.3.2 de \"@openzeppelin/contracts\" y \"@openzeppelin/contracts-upgradeable\". Para usuarios que no puedan actualizar; inicialice los contratos de implementación usando \"UUPSUpgradeable\" al invocar la función inicializadora (normalmente llamada \"initialize\"). Se proporciona un ejemplo [en el foro](https://forum.openzeppelin.com/t/security-advisory-initialize-uups-implementation-contracts/15301)"}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"OpenZeppelin","product":"openzeppelin-contracts","versions":[{"version":">= 4.1.0 < 4.3.2","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":9.8,"baseSeverity":"CRITICAL","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":5.9}],"cvssMetricV2":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"2.0","vectorString":"AV:N/AC:L/Au:N/C:P/I:P/A:P","baseScore":7.5,"accessVector":"NETWORK","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"PARTIAL","integrityImpact":"PARTIAL","availabilityImpact":"PARTIAL"},"baseSeverity":"HIGH","exploitabilityScore":10.0,"impactScore":6.4,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-665"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:openzeppelin:contracts:*:*:*:*:*:node.js:*:*","versionStartIncluding":"4.1.0","versionEndExcluding":"4.3.2","matchCriteriaId":"F34D8174-091A-492C-A3B5-C29575554D58"}]}]}],"references":[{"url":"https://forum.openzeppelin.com/t/security-advisory-initialize-uups-implementation-contracts/15301","source":"security-advisories@github.com","tags":["Issue Tracking","Mitigation","Patch","Vendor Advisory"]},{"url":"https://github.com/OpenZeppelin/openzeppelin-contracts/commit/024cc50df478d2e8f78539819749e94d6df60592","source":"security-advisories@github.com","tags":["Patch","Third Party Advisory"]},{"url":"https://github.com/OpenZeppelin/openzeppelin-contracts/security/advisories/GHSA-5vp3-v4hc-gx76","source":"security-advisories@github.com","tags":["Third Party Advisory"]},{"url":"https://forum.openzeppelin.com/t/security-advisory-initialize-uups-implementation-contracts/15301","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Issue Tracking","Mitigation","Patch","Vendor Advisory"]},{"url":"https://github.com/OpenZeppelin/openzeppelin-contracts/commit/024cc50df478d2e8f78539819749e94d6df60592","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch","Third Party Advisory"]},{"url":"https://github.com/OpenZeppelin/openzeppelin-contracts/security/advisories/GHSA-5vp3-v4hc-gx76","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Third Party Advisory"]}]}}]}