{"cve":"CVE-2018-16489","nvd":{"published":"2019-02-01T18:29:00.987","modified":"2026-06-17T01:44:22.997","status":"Modified","description":"A prototype pollution vulnerability was found in just-extend <4.0.0 that allows attack to inject properties onto Object.prototype through its functions.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":["CWE-74","CWE-400"],"references":["https://hackerone.com/reports/430291","https://hackerone.com/reports/430291"],"products":["just-extend_project:just-extend"],"source":"nvd","synced_at":"2026-10-19T20:54:46.948512734+00:00"},"epss":{"cve":"CVE-2018-16489","score":0.01836,"percentile":0.78937,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-675m-85rw-j3w4","url":"https://osv.dev/vulnerability/GHSA-675m-85rw-j3w4","summary":"Prototype Pollution in just-extend","modified":"2023-11-08T04:00:00.870849Z","packages":[{"ecosystem":"npm","name":"just-extend","purl":"pkg:npm/just-extend","ranges":["<4.0.0"],"fixed":["4.0.0"]}]}],"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."]}