CVE-2016-9954: Irregex Project Irregex

High severity, CVSS 7.5. EPSS: 2.4% chance of exploitation in the next 30 days.

The backtrack compilation code in the Irregex package (aka IrRegular Expressions) before 0.9.6 for Scheme allows remote attackers to cause a denial of service (memory consumption) via a crafted regular expression with a repeating pattern.

Affected products

• Irregex Project Irregex: up to and including 0.9.5

Published 2017-04-21. Last modified 2026-06-17.