{"id":"CVE-2018-3721","aliases":["AZL-45420","CLSA-2026-1773188140","CLSA-2026-1775262599","CLSA-2026-1775262601","CLSA-2026-1775262602","CLSA-2026-1777336764","CLSA-2026-1784250516","CLSA-2026-1791290323","DEBIAN-CVE-2018-3721","EUVD-2018-0265","GHSA-fvqr-27wr-82fm","UBUNTU-CVE-2018-3721"],"status":"published","title":"Prototype Pollution in lodash","description":"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.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.02347,"percentile":0.83806,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-1321","CWE-471"],"published":"2018-06-07T02:00:00Z","modified":"2026-11-05T05:36:30Z","fixes":[{"ecosystem":"npm","package":"lodash","fixed_in":["4.17.5"],"sources":["ghsa","osv"]},{"ecosystem":"RubyGems","package":"lodash-rails","fixed_in":["4.17.5"],"sources":["ghsa","osv"]},{"ecosystem":"TuxCare:npm","package":"lodash","fixed_in":["4.17.4-tuxcare.1"],"sources":["osv"]},{"ecosystem":"Debian:12","package":"node-lodash","fixed_in":["4.17.11+dfsg-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"node-lodash","fixed_in":["4.17.11+dfsg-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"node-lodash","fixed_in":["4.17.11+dfsg-1"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"lodash","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.17.5"}]}]},{"source":"ghsa","ecosystem":"RubyGems","package":"lodash-rails","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.17.5"}]}]},{"source":"osv","ecosystem":"Azure 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},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"node-lodash","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.17.4+dfsg-1","4.17.4+dfsg-1ubuntu0.1~esm1"]}],"products":[{"vendor":"hackerone","product":"lodash node module"},{"vendor":"lodash","product":"lodash"},{"vendor":"netapp","product":"active_iq_unified_manager"},{"vendor":"netapp","product":"system_manager"}],"references":[{"url":"https://hackerone.com/reports/310443","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence","web"]},{"url":"https://github.com/lodash/lodash/commit/d8e069cc3410082e44eb18fcf8e7f3d08ebe1d4a","tags":["x_refsource_MISC","x_transferred","Patch","fix","web","report"]},{"url":"https://security.netapp.com/advisory/ntap-20190919-0004/","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-3721","tags":["web","advisory"]},{"url":"https://security.netapp.com/advisory/ntap-20190919-0004","tags":["web"]},{"url":"https://github.com/rubysec/ruby-advisory-db/blob/master/gems/lodash-rails/CVE-2018-3721.yml","tags":["web"]},{"url":"https://github.com/advisories/GHSA-fvqr-27wr-82fm"},{"url":"https://security-tracker.debian.org/tracker/CVE-2018-3721","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2018-3721","tags":["report"]},{"url":"https://snyk.io/vuln/npm:lodash:20180130","tags":["report"]},{"url":"https://www.npmjs.com/advisories/577","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2018-3721","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2018-3721","description":"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.","status":"published","published":"2018-06-07T02:00:00Z","modified":"2024-09-16T22:34:54.59Z","cwes":["CWE-471"],"updated_at":"2026-11-02T14:35:05.262903Z"}],"euvd":[{"id":"EUVD-2018-0265","description":"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.","status":"published","published":"2018-06-07T02:00:00Z","modified":"2024-09-16T22:34:54Z","updated_at":"2026-11-03T00:55:02.001238Z"}],"ghsa":[{"id":"GHSA-fvqr-27wr-82fm","title":"Prototype Pollution in lodash","description":"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.","status":"published","published":"2018-07-26T15:14:52Z","modified":"2025-08-12T21:37:10Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","level":"medium"}],"cwes":["CWE-471","CWE-1321"],"updated_at":"2026-11-02T14:38:53.767052Z"}],"nvd":[{"id":"CVE-2018-3721","description":"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.","status":"published","published":"2018-06-07T02:29:08.317Z","modified":"2026-06-17T01:57:43.36Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":4,"vector":"AV:N/AC:L/Au:S/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-471","CWE-1321"],"updated_at":"2026-11-02T14:04:28.483469Z"}],"osv":[{"id":"AZL-45420","title":"CVE-2018-3721 affecting package js-jquery 3.5.0-4","description":"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 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