Check Point Advisories

HTTP/2 Denial of Service (CVE-2019-9513)

Vulnerability
Protection

Check Point Reference:	CPAI-2019-3549
Date Published:	25 Jan 2026
Severity:	High
Last Updated:	Sunday 25 January, 2026
Source:
Industry Reference:	CVE-2019-9513
Protection Provided by:	Security Gateway R81, R80
Who is Vulnerable?	Apple SwiftNIO 1.0.0 and later, 1.4.0 and prior Apache Traffic Server 6.0.0 and later, 6.2.3 and prior Apache Traffic Server 7.0.0 and later, 7.1.6 and prior Apache Traffic Server 8.0.0 and later, 8.0.3 and prior RedHat JBoss Core Services 1.0 RedHat JBoss Enterprise Application Platform 7.2.0 RedHat JBoss Enterprise Application Platform 7.3.0 RedHat OpenShift Service Mesh 1.0 RedHat Quay 3.0.0 RedHat Software Collections 1.0 Oracle GraalVM 19.2.0 Enterprise McAfee Web Gateway 7.7.2.0 and later, prior to 7.7.2.24 McAfee Web Gateway 7.8.2.0 and later, prior to 7.8.2.13 McAfee Web Gateway 8.1.0 and later, prior to 8.2.0 F5 NGINX 1.9.5 and later, prior to 1.16.1 F5 NGINX 1.17.0 and later, 1.17.2 and prior Oracle Enterprise Communications Broker 3.1.0 Oracle Enterprise Communications Broker 3.2.0 NodeJS Node.js 8.0.0 and later, 8.8.1 and prior NodeJS Node.js 8.9.0 and later, prior to 8.16.1 NodeJS Node.js 10.0.0 and later, 10.12.0 and prior NodeJS Node.js 10.13.0 and later, prior to 10.16.3 NodeJS Node.js 12.0.0 and later, prior to 12.8.1
Vulnerability Description	A denial of service vulnerability in HTTP/2 allows attackers to create multiple request streams and shuffle their priorities, consuming excess CPU and causing substantial churn to the priority tree.

Protection Overview

This protection detects attempts to exploit this vulnerability.

In order for the protection to be activated, update your Security Gateway product to the latest IPS update. For information on how to update IPS, go to SBP-2006-05, click on Protection tab and select the version of your choice.

Security Gateway R80

In the IPS tab, click Protections and find the HTTP/2 Denial of Service (CVE-2019-9513) protection using the Search tool and Edit the protection's settings.
Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name: Web Server Enforcement Violation.
Attack Information: HTTP/2 Denial of Service (CVE-2019-9513)