{"id":"GHSA-gjm5-83cw-p3p2","summary":"Prototype Pollution in extend2","details":"The package extend2 before 1.0.1 are vulnerable to Prototype Pollution via the extend function due to unsafe recursive merge.","aliases":["CVE-2021-23568","SNYK-JS-EXTEND2-2320315"],"modified":"2026-09-10T03:49:27.701468105Z","published":"2022-01-12T22:59:13Z","database_specific":{"nvd_published_at":"2022-01-10T14:10:00Z","cwe_ids":["CWE-1321"],"severity":"HIGH","github_reviewed":true,"github_reviewed_at":"2022-01-11T18:11:48Z"},"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-23568"},{"type":"WEB","url":"https://github.com/eggjs/extend2/pull/2"},{"type":"WEB","url":"https://github.com/eggjs/extend2/commit/aa332a59116c8398976434b57ea477c6823054f8"},{"type":"PACKAGE","url":"https://github.com/eggjs/extend2"},{"type":"WEB","url":"https://github.com/eggjs/extend2/blob/master/index.js%23L50-L60"},{"type":"WEB","url":"https://snyk.io/vuln/SNYK-JS-EXTEND2-2320315"}],"affected":[{"package":{"name":"extend2","ecosystem":"npm","purl":"pkg:npm/extend2"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.0.1"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/01/GHSA-gjm5-83cw-p3p2/GHSA-gjm5-83cw-p3p2.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L"}]}