{"id":"CVE-2018-3728","aliases":["GHSA-jp4x-w63m-7wgm"],"url":"https://o3.security/vulnerability/CVE-2018-3728","summary":"Prototype Pollution in hoek","details":"hoek node module before 4.2.0 and 5.0.x before 5.0.3 suffers from a Modification of Assumed-Immutable Data (MAID) vulnerability via 'merge' and 'applyToDefaults' functions, which allows a malicious user to modify the prototype of \"Object\" via __proto__, causing the addition or modification of an existing property that will exist on all objects.","published":"2018-03-30T19:29:00.210Z","modified":"2026-07-08T20:14:50.870350Z","cvss":{"score":8.8,"severity":"HIGH","vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":2,"affectedPackages":[{"ecosystem":"npm","name":"hoek","fixedVersion":"5.0.3"},{"ecosystem":"npm","name":"hoek","fixedVersion":"4.2.1"}],"fix":{"url":"https://github.com/hapijs/hoek/commit/32ed5c9413321fbc37da5ca81a7cbab693786dee","label":"hapijs/hoek@32ed5c9"},"references":[{"type":"ADVISORY","url":"http://www.securityfocus.com/bid/103108"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2018:1263"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2018:1264"},{"type":"ADVISORY","url":"https://nodesecurity.io/advisories/566"},{"type":"FIX","url":"https://github.com/hapijs/hoek/commit/32ed5c9413321fbc37da5ca81a7cbab693786dee"},{"type":"FIX","url":"https://snyk.io/vuln/npm:hoek:20180212"},{"type":"EVIDENCE","url":"https://hackerone.com/reports/310439"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T20:14:50.870350Z"}}