CVE Vulnerabilities

CVE-2026-33523

DEPRECATED: HTTP response splitting

Published: May 04, 2026 | Modified: Jun 17, 2026
CVSS 3.x
N/A
Source:
NVD
CVSS 2.x
RedHat/V2
RedHat/V3
6.5 MODERATE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Ubuntu
LOW
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HTTP response splitting vulnerability in multiple Apache HTTP Server modules with untrusted or compromised backend servers.

This issue affects Apache HTTP Server: from through 2.4.66.

Users are recommended to upgrade to version 2.4.67, which fixes the issue.

Weakness

This weakness can be found at CWE-113.

Affected Software

NameVendorStart VersionEnd Version
Http_serverApache2.4.0 (including)2.4.67 (excluding)
JBoss Core Services for RHEL 8RedHatjbcs-httpd24-httpd-0:2.4.62-17.el8jbcs*
JBoss Core Services for RHEL 8RedHatjbcs-httpd24-mod_http2-0:2.0.29-14.el8jbcs*
JBoss Core Services for RHEL 8RedHatjbcs-httpd24-mod_jk-0:1.2.50-18.redhat_1.el8jbcs*
JBoss Core Services for RHEL 8RedHatjbcs-httpd24-mod_md-1:2.4.28-20.el8jbcs*
JBoss Core Services for RHEL 8RedHatjbcs-httpd24-mod_proxy_cluster-0:1.3.22-13.el8jbcs*
JBoss Core Services for RHEL 8RedHatjbcs-httpd24-mod_security-0:2.9.6-20.el8jbcs*
Red Hat JBoss Core Services 2.4.62.SP6RedHatjbcs-httpd24-httpd*
Red Hat Hardened ImagesRedHathttpd-main-2.4.67-1.hum1*
Apache2Ubuntudevel*
Apache2Ubuntuesm-infra-legacy/trusty*
Apache2Ubuntuesm-infra-legacy/xenial*
Apache2Ubuntuesm-infra/bionic*
Apache2Ubuntuesm-infra/focal*
Apache2Ubuntuesm-infra/xenial*
Apache2Ubuntujammy*
Apache2Ubuntunoble*
Apache2Ubuntuquesting*
Apache2Ubunturesolute*
Apache2Ubuntuupstream*

References