{"cve":"CVE-2021-36716","nvd":{"published":"2021-07-14T16:15:07.860","modified":"2026-06-17T03:59:02.490","status":"Modified","description":"A ReDoS (regular expression denial of service) flaw was found in the Segment is-email package before 1.0.1 for Node.js. An attacker that is able to provide crafted input to the isEmail(input) function may cause an application to consume an excessive amount of CPU.","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:N/A:H","score":7.5},"cwes":["CWE-400"],"references":["https://github.com/segmentio/is-email/releases","https://segment.com/docs/release_notes/2021-07-13-cve-2021-36716/","https://github.com/segmentio/is-email/releases","https://segment.com/docs/release_notes/2021-07-13-cve-2021-36716/"],"products":["segment:is-email"],"source":"nvd","synced_at":"2026-10-19T21:21:13.713336758+00:00"},"epss":{"cve":"CVE-2021-36716","score":0.0099,"percentile":0.62524,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-j377-2x76-558h","url":"https://osv.dev/vulnerability/GHSA-j377-2x76-558h","summary":"Improper Input Validation in is-email","modified":"2023-11-08T04:06:15.563828Z","packages":[{"ecosystem":"npm","name":"is-email","purl":"pkg:npm/is-email","ranges":["<1.0.1"],"fixed":["1.0.1"]}]}],"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."]}