Apache Critical Vulnerability CVE-2026-23918 Fix Guide

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Apache Critical Vulnerability CVE-2026-23918 Fix Guide
  • Tirsdag, Maj 5, 2026
Immediate action required
A critical vulnerability has been confirmed in Apache HTTP Server. Patch all servers immediately to prevent exploitation.
CVE-2026-23918
Remote code execution — Apache HTTP/2
Critical severity Security advisory Apache / CloudLinux
Affected
2.4.66
Fixed in
2.4.67
About this vulnerability
A serious security flaw in Apache HTTP Server allows attackers to execute arbitrary remote code via a flaw in the HTTP/2 implementation. Upgrade to version 2.4.67 which resolves the issue completely.
Patch instructions by OS
 
RHEL-based (CentOS / CloudLinux)
bash
yum clean all
yum makecache
yum -y update ea-apache*
 
AlmaLinux
bash
dnf clean all
dnf makecache
dnf -y update ea-apache*
 
Ubuntu
bash
apt update
apt install --only-upgrade "ea-apache24*"
CloudLinux — temporary fix (testing repo)
If 2.4.67 is not yet available in the stable repo, enable the testing channel:
bash
yum update ea-apache24 --enablerepo=cl-ea4-testing
CloudLinux KB article →
Verify the update
bash
httpd -v
Expected output: Apache/2.4.67
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