{
"id": "GHSA-fvqr-27wr-82fm",
"aliases": [
"CVE-2018-3721"
],
"details": "Versions of `lodash` before 4.17.5 are vulnerable to prototype pollution. \n\nThe vulnerable functions are 'defaultsDeep', 'merge', and 'mergeWith' which allow 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.\n\n\n\n\n## Recommendation\n\nUpdate to version 4.17.5 or later.",
"summary": "Prototype Pollution in lodash",
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "4.17.5"
}
]
}
],
"package": {
"name": "lodash",
"ecosystem": "npm"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "4.17.5"
}
]
}
],
"package": {
"name": "lodash-rails",
"ecosystem": "RubyGems"
}
}
],
"modified": "2025-08-12T21:37:06Z",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N"
}
],
"published": "2018-07-26T15:14:52Z",
"references": [
{
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-3721",
"type": "ADVISORY"
},
{
"url": "https://github.com/lodash/lodash/commit/d8e069cc3410082e44eb18fcf8e7f3d08ebe1d4a",
"type": "WEB"
},
{
"url": "https://hackerone.com/reports/310443",
"type": "WEB"
},
{
"url": "https://github.com/rubysec/ruby-advisory-db/blob/master/gems/lodash-rails/CVE-2018-3721.yml",
"type": "WEB"
},
{
"url": "https://security.netapp.com/advisory/ntap-20190919-0004",
"type": "WEB"
}
],
"schema_version": "1.4.0",
"database_specific": {
"cwe_ids": [
"CWE-1321",
"CWE-471"
],
"severity": "MODERATE",
"github_reviewed": true,
"nvd_published_at": "2018-06-07T02:29:08Z",
"github_reviewed_at": "2020-06-16T21:35:26Z"
}
}