CVE-2019-11387

An issue was discovered in OWASP ModSecurity Core Rule Set (CRS) through 3.1.0. /rules/REQUEST...

5.3 MediumFix available

An issue was discovered in OWASP ModSecurity Core Rule Set (CRS) through 3.1.0. /rules/REQUEST-942-APPLICATION-ATTACK-SQLI.conf allows remote attackers to cause a denial of service (ReDOS) by entering a specially crafted string with nested repetition operators.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: Low

Exploit likelihood

2.38%Up 1.1 points since Apr 14, 2021

What each source reports

NVD Score used 5.3

Record: CVE-2019-11387
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CVSS 2.0: 4.3 MediumAV:N/AC:M/Au:N/C:N/I:N/A:P
Weakness: CWE-400
Updated: 2026-11-02

CVE List No score

Record: CVE-2019-11387
Updated: 2026-11-02

EUVDEUVD-2019-3065 No score

Record: EUVD-2019-3065
Updated: 2026-11-03

GitHub AdvisoriesGHSA-473r-xgj8-7xqq 5.3

An issue was discovered in OWASP ModSecurity Core Rule Set (CRS) through 3.1.0. /rules/REQUEST...

Record: GHSA-473r-xgj8-7xqq
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Weakness: CWE-185, CWE-400
Updated: 2026-11-02

OSV 5.3

Record: CVE-2019-11387
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Updated: 2026-11-02

OSVDEBIAN-CVE-2019-11387 5.3

Record: DEBIAN-CVE-2019-11387
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Updated: 2026-11-02

OSVUBUNTU-CVE-2019-11387 5.3

Record: UBUNTU-CVE-2019-11387
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Updated: 2026-11-02

Affected products

modsecurity owasp modsecurity core rule set

Affected packages

Affected packages
Package	Affected	Fixed
`modsecurity-crs` Debian:12	before 3.1.1-1	3.1.1-1
`modsecurity-crs` Debian:13	before 3.1.1-1	3.1.1-1
`modsecurity-crs` Debian:14	before 3.1.1-1	3.1.1-1
`modsecurity-crs` Ubuntu:16.04:LTS	All versions, plus listed versions 2.2.9-1	None known
`modsecurity-crs` Ubuntu:18.04:LTS	All versions, plus listed versions 3.0.0-33.0.2-1	None known

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2019-11387 is a medium vulnerability (CVSS 5.3) in Modsecurity Owasp Modsecurity Core Rule Set, published April 21, 2019. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.38%, the 83rd percentile. Fixed in modsecurity-crs 3.1.1-1.