Medium
Security advisory
lodash node module before 4.17.5 suffers from a Modification of Assumed-Immutable Data (MAID) vulnerability via defaultsDeep, merge, and mergeWith 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.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2018-3721
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 10:43 UTC · Revision 1
Source evidence
lodash node module before 4.17.5 suffers from a Modification of Assumed-Immutable Data (MAID) vulnerability via defaultsDeep, merge, and mergeWith 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.
osv:CVE-2018-3721
Complete source record
{
"id": "365cbdf52ca8835511f077cee07ed4086e86d0631c34b319d18abc242a6cc625",
"url": "https://osv.dev/vulnerability/CVE-2018-3721",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2018-3721",
"summary": "lodash node module before 4.17.5 suffers from a Modification of Assumed-Immutable Data (MAID) vulnerability via defaultsDeep, merge, and mergeWith 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.",
"evidence": "osv:CVE-2018-3721",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2018-3721",
"aliases": [
"CVE-2018-3721",
"GHSA-fvqr-27wr-82fm"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/lodash/lodash",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "0e314104d6f37539ed08820d8547cdd953451657"
},
{
"fixed": "d8e069cc3410082e44eb18fcf8e7f3d08ebe1d4a"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:lodash:lodash:*:*:*:*:*:node.js:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "4.17.5"
}
],
"source": "CPE_RANGE"
},
{
"range": [
{
"fixed": "d8e069cc3410082e44eb18fcf8e7f3d08ebe1d4a"
}
],
"source": "REFERENCES_COMMIT"
}
]
}
}
],
"versions": [
"4.17.4-npm",
"4.17.4",
"4.17.3-npm",
"4.17.3",
"4.17.2-npm",
"4.17.2",
"4.17.1-npm",
"4.17.1",
"4.17.0-npm",
"4.17.0",
"4.16.6-npm",
"4.16.6",
"4.16.5-npm",
"4.16.5",
"4.16.4-npm",
"4.16.4",
"4.16.3-npm",
"4.16.3",
"4.16.2-npm",
"4.16.2",
"4.16.1-npm",
"4.16.1",
"4.16.0-npm",
"4.16.0",
"4.15.0-npm",
"4.15.0",
"4.14.2-npm",
"4.14.2",
"4.14.1-npm",
"4.14.1",
"4.14.0-npm",
"4.14.0",
"4.13.1-npm",
"4.13.1",
"4.13.0-npm",
"4.13.0",
"4.12.0-npm",
"4.12.0",
"4.11.2-npm",
"4.11.2",
"4.11.1-npm",
"4.11.1",
"4.11.0-npm",
"4.11.0",
"4.10.0-npm",
"4.10.0",
"4.9.0-npm",
"4.9.0",
"4.8.2-npm",
"4.8.2",
"4.8.1-npm",
"4.8.0-npm",
"4.7.0-npm",
"4.8.1",
"4.8.0",
"4.7.0",
"4.6.1-npm",
"4.6.1",
"4.6.0-npm",
"4.6.0",
"4.5.1-npm",
"4.5.1",
"4.5.0-npm",
"4.5.0",
"4.4.0-npm",
"4.4.0",
"4.3.0-npm",
"4.3.0",
"4.2.1",
"4.2.1-npm",
"4.2.0-npm",
"4.2.0",
"4.1.0-npm",
"4.1.0",
"4.0.1-npm",
"4.0.1",
"4.0.0-npm",
"4.0.0",
"3.10.1-npm",
"3.10.0-npm",
"3.10.1",
"3.9.3-npm",
"3.9.3",
"3.9.2-npm",
"3.9.2",
"3.9.1-npm",
"3.9.0",
"3.9.0-npm",
"3.8.0-npm",
"3.8.0",
"3.7.0-npm",
"3.7.0",
"3.6.0-npm",
"3.6.0",
"3.5.0-npm",
"3.5.0",
"3.4.0-npm",
"3.4.0",
"3.3.1-npm",
"3.3.1",
"3.3.0-npm",
"3.3.0",
"3.2.0-npm",
"3.2.0",
"3.1.0-npm",
"3.1.0",
"3.0.1",
"3.0.0",
"3.0.1-npm",
"3.0.0-npm",
"1.1.0",
"1.0.1",
"1.0.0",
"1.0.0-rc.3",
"1.0.0-rc.2",
"1.0.0-rc.1",
"0.10.0",
"0.9.2",
"0.9.1",
"0.9.0",
"0.8.2",
"0.8.1",
"0.8.0",
"0.7.0",
"0.6.1",
"0.6.0",
"0.5.2",
"0.5.1",
"0.5.0",
"0.4.2",
"0.4.1",
"0.4.0",
"0.3.2",
"0.3.1",
"0.3.0",
"0.2.2",
"0.2.1",
"0.2.0",
"0.1.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-3721.json"
}
}
],
"modified": "2026-10-20T10:51:27.630346586Z",
"provider": "osv",
"references": [
"https://security.netapp.com/advisory/ntap-20190919-0004/",
"https://github.com/lodash/lodash/commit/d8e069cc3410082e44eb18fcf8e7f3d08ebe1d4a",
"https://hackerone.com/reports/310443"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:a:netapp:system_manager:9.0:*:*:*:*:*:*:*"
],
"vendor_product": "netapp:system_manager",
"extracted_events": [
{
"range": [
{
"introduced": "9.0"
},
{
"last_affected": "9.0"
}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2018-3721",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 382560,
"published_at": "2018-06-07T02:29:08.317+00:00"
}