CVE-2021-36716: Segment Is-Email

High severity, CVSS 7.5. EPSS: 1% chance of exploitation in the next 30 days.

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.

Affected products

• Segment Is-Email: before 1.0.1 (fixed in 1.0.1)

Published 2021-07-14. Last modified 2026-06-17.