CVE-2019-11389: Modsecurity Owasp Modsecurity Core Rule Set

Medium severity, CVSS 5.3. EPSS: 1.6% chance of exploitation in the next 30 days.

An issue was discovered in OWASP ModSecurity Core Rule Set (CRS) through 3.1.0. /rules/REQUEST-933-APPLICATION-ATTACK-PHP.conf allows remote attackers to cause a denial of service (ReDOS) by entering a specially crafted string with next# at the beginning and nested repetition operators. NOTE: the software maintainer disputes that this is a vulnerability because the issue cannot be exploited via ModSecurity

Affected products

• Modsecurity Owasp Modsecurity Core Rule Set: up to and including 3.1.0

Published 2019-04-21. Last modified 2026-06-17.