{"id":"CVE-2024-27094","summary":"OpenZeppelin Contracts base64 encoding may read from potentially dirty memory","details":"OpenZeppelin Contracts is a library for secure smart contract development. The `Base64.encode` function encodes a `bytes` input by iterating over it in chunks of 3 bytes. When this input is not a multiple of 3, the last iteration may read parts of the memory that are beyond the input buffer. The vulnerability is fixed in 5.0.2 and 4.9.6.","aliases":["GHSA-9vx6-7xxf-x967"],"modified":"2026-08-12T03:51:20.532308808Z","published":"2024-02-29T18:18:24.721Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-125"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/27xxx/CVE-2024-27094.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/27xxx/CVE-2024-27094.json"},{"type":"ADVISORY","url":"https://github.com/OpenZeppelin/openzeppelin-contracts/security/advisories/GHSA-9vx6-7xxf-x967"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-27094"},{"type":"FIX","url":"https://github.com/OpenZeppelin/openzeppelin-contracts-upgradeable/commit/2d081f24cac1a867f6f73d512f2022e1fa987854"},{"type":"FIX","url":"https://github.com/OpenZeppelin/openzeppelin-contracts-upgradeable/commit/723f8cab09cdae1aca9ec9cc1cfa040c2d4b06c1"},{"type":"FIX","url":"https://github.com/OpenZeppelin/openzeppelin-contracts/commit/92224533b1263772b0774eec3134e132a3d7b2a6"},{"type":"FIX","url":"https://github.com/OpenZeppelin/openzeppelin-contracts/commit/a6286d0fded8771b3a645e5813e51993c490399c"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/openzeppelin/openzeppelin-contracts","events":[{"introduced":"a5445b0afb8b350417b6e6ab3160554967bc151f"},{"fixed":"dc44c9f1a4c3b10af99492eed84f83ed244203f6"},{"introduced":"932fddf69a699a9a80fd2396fd1a2ab91cdda123"},{"fixed":"dbb6104ce834628e473d2173bbc9d47f81a9eec3"},{"fixed":"92224533b1263772b0774eec3134e132a3d7b2a6"},{"fixed":"a6286d0fded8771b3a645e5813e51993c490399c"}],"database_specific":{"source":["CPE_RANGE","REFERENCES"],"cpe":["cpe:2.3:a:openzeppelin:contracts:*:*:*:*:*:node.js:*:*","cpe:2.3:a:openzeppelin:contracts_upgradeable:*:*:*:*:*:node.js:*:*"],"extracted_events":[{"introduced":"4.5.0"},{"fixed":"4.9.6"},{"last_affected":"4.9.6"},{"introduced":"5.0.0"},{"fixed":"5.0.2"}]}},{"type":"GIT","repo":"https://github.com/openzeppelin/openzeppelin-contracts-upgradeable","events":[{"introduced":"ac9661a4957daf94f1512d710e7a7c4df2cb7385"},{"last_affected":"2d081f24cac1a867f6f73d512f2022e1fa987854"},{"introduced":"625fb3c2b2696f1747ba2e72d1e1113066e6c177"},{"fixed":"723f8cab09cdae1aca9ec9cc1cfa040c2d4b06c1"},{"fixed":"2d081f24cac1a867f6f73d512f2022e1fa987854"}],"database_specific":{"extracted_events":[{"introduced":"4.5.0"},{"last_affected":"4.9.6"},{"introduced":"5.0.0"},{"fixed":"5.0.2"}],"source":["CPE_RANGE","REFERENCES"],"cpe":"cpe:2.3:a:openzeppelin:contracts_upgradeable:*:*:*:*:*:node.js:*:*"}}],"versions":["v5.0.1","v5.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-27094.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H"}]}