{"id":"CVE-2020-28280","aliases":["GHSA-mx3x-ghqm-r43h"],"url":"https://o3.security/vulnerability/CVE-2020-28280","summary":"Prototype pollution vulnerability in 'predefine'","details":"Prototype pollution vulnerability in 'predefine' versions 0.0.0 through 0.1.2 allows an attacker to cause a denial of service and may lead to remote code execution.","published":"2020-12-29T18:15:12.743Z","modified":"2026-07-08T17:57:26.083735Z","cvss":{"score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":{"score":0.02944,"percentile":0.86036,"asOf":"2026-08-23"},"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"npm","name":"predefine","fixedVersion":"0.1.3"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://www.whitesourcesoftware.com/vulnerability-database/CVE-2020-28280"},{"type":"EVIDENCE","url":"https://github.com/bigpipe/predefine/blob/238137e3d1b8288ff5d7529c3cbcdd371888c26b/index.js#L284"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T17:57:26.083735Z"}}