{"cve":"CVE-2019-20149","nvd":{"published":"2019-12-30T19:15:11.910","modified":"2026-06-17T02:30:00.723","status":"Modified","description":"ctorName in index.js in kind-of v6.0.2 allows external user input to overwrite certain internal attributes via a conflicting name, as demonstrated by 'constructor': {'name':'Symbol'}. Hence, a crafted payload can overwrite this builtin attribute to manipulate the type detection result.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","score":7.5},"cwes":["CWE-668"],"references":["https://github.com/jonschlinkert/kind-of/issues/30","https://github.com/jonschlinkert/kind-of/pull/31","https://github.com/jonschlinkert/kind-of/issues/30","https://github.com/jonschlinkert/kind-of/pull/31"],"products":["kind-of_project:kind-of"],"source":"nvd","synced_at":"2026-10-19T20:59:27.069234358+00:00"},"epss":{"cve":"CVE-2019-20149","score":0.02342,"percentile":0.83635,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-6c8f-qphg-qjgp","url":"https://osv.dev/vulnerability/GHSA-6c8f-qphg-qjgp","summary":"Validation Bypass in kind-of","modified":"2023-11-08T04:01:30.082511Z","packages":[{"ecosystem":"npm","name":"kind-of","purl":"pkg:npm/kind-of","ranges":[">=6.0.0 <6.0.3"],"fixed":["6.0.3"]}]}],"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."]}