What’s Vulnerable › Vulnerabilities

CVE-2021-36716

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-07-14 · updated 2026-06-17
• Weakness: CWE-400

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.

Affected products

• Segment Is-Email: before 1.0.1 — fixed in 1.0.1

How to fix

Upgrade to a fixed version: Segment Is-Email 1.0.1. Check the vendor advisory for mitigations.

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/

Get alerted when CVE-2021-36716 or the next vulnerability affects your stack