{"cve":"CVE-2018-3722","nvd":{"published":"2018-06-07T02:29:08.363","modified":"2026-06-17T01:57:43.463","status":"Modified","description":"merge-deep node module before 3.0.1 suffers from a Modification of Assumed-Immutable Data (MAID) vulnerability, 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.","cvss_v4":null,"cvss_v3":{"version":"3.0","vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":8.8},"cwes":["CWE-471"],"references":["https://github.com/jonschlinkert/merge-deep/commit/2c33634da7129a5aefcc262d2fec2e72224404e5","https://hackerone.com/reports/310708","https://github.com/jonschlinkert/merge-deep/commit/2c33634da7129a5aefcc262d2fec2e72224404e5","https://hackerone.com/reports/310708"],"products":["merge-deep_project:merge-deep"],"source":"nvd","synced_at":"2026-10-19T20:50:40.212176939+00:00"},"epss":{"cve":"CVE-2018-3722","score":0.02004,"percentile":0.80802,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-9g9w-hmvj-5h57","url":"https://osv.dev/vulnerability/GHSA-9g9w-hmvj-5h57","summary":"Prototype Pollution in merge-deep","modified":"2023-11-08T04:00:17.242164Z","packages":[{"ecosystem":"npm","name":"merge-deep","purl":"pkg:npm/merge-deep","ranges":["<3.0.1"],"fixed":["3.0.1"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}