Out-of-bounds read in Apache HTTP Server - CVE-2026-44185

Vulnerability identifier: #VU133900

CSH Severity: Medium

CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-44185

CWE-ID: CWE-125

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to disclose sensitive information.

The vulnerability exists due to out-of-bounds read in mod_ssl OCSP send_request when sending outbound OCSP requests to an attacker-controlled OCSP server. A remote attacker can operate a malicious OCSP server to disclose sensitive information.

Apache HTTP Server
SUSE Linux Enterprise Server 15 SP6
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Desktop 15
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for ARM 64
Anolis OS
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Ubuntu
SUSE Package Hub 15
Server Applications Module
Basesystem Module
openSUSE Leap
mod_http2
mod_md
apache2 (Ubuntu package)
httpd-tools
httpd
httpd-devel
mod_ldap
mod_proxy_html
mod_session
mod_ssl
httpd-filesystem
httpd-manual
httpd (Red Hat package)
apache2-debugsource
apache2-tls13-devel
apache2-worker
apache2-devel
apache2-tls13-debugsource
apache2-tls13-example-pages
apache2-doc
apache2-tls13-doc
apache2-prefork-debuginfo
apache2
apache2-tls13-prefork-debuginfo
apache2-debuginfo
apache2-tls13-utils-debuginfo
apache2-prefork
apache2-utils
apache2-tls13
apache2-utils-debuginfo
apache2-tls13-worker
apache2-tls13-prefork
apache2-tls13-utils
apache2-worker-debuginfo
apache2-tls13-debuginfo
apache2-example-pages
apache2-tls13-worker-debuginfo
apache2-event
apache2-event-debuginfo
apache2-worker-debugsource
apache2-event-debugsource
apache2-utils-debugsource
apache2-prefork-debugsource
apache2-manual

Install security update from vendor's website.

Apache HTTP Server - update to 2.4.68
mod_http2 - update to 1.15.7-10
mod_md - update to 2.0.8-8
apache2 (Ubuntu package) - addressed in versions 2.4.7-1ubuntu4.22+esm14, 2.4.18-2ubuntu3.17+esm19, 2.4.29-1ubuntu4.27+esm10, 2.4.41-4ubuntu3.23+esm5, 2.4.52-1ubuntu4.23, 2.4.58-1ubuntu8.15, 2.4.66-2ubuntu2.4
httpd-tools - update to 2.4.37-655.0.1
httpd - update to 2.4.37-655.0.1
httpd-devel - update to 2.4.37-655.0.1
mod_ldap - update to 2.4.37-655.0.1
mod_proxy_html - update to 2.4.37-655.0.1
mod_session - update to 2.4.37-655.0.1
mod_ssl - update to 2.4.37-655.0.1
httpd-filesystem - update to 2.4.37-655.0.1
httpd-manual - update to 2.4.37-655.0.1
httpd (Red Hat package) - addressed in versions 2.4.63-1.el10_0.4, 2.4.63-13.el10_2.4
apache2-debugsource - addressed in versions 2.4.66-35.81.1, 2.4.66-150400.6.57.1, 2.4.66-150600.5.55.1, 2.4.66-150700.4.23.1
apache2-tls13-devel - update to 2.4.66-35.81.1
apache2-worker - addressed in versions 2.4.66-35.81.1, 2.4.66-150400.6.57.1, 2.4.66-150600.5.55.1, 2.4.66-150700.4.23.1
apache2-devel - addressed in versions 2.4.66-35.81.1, 2.4.66-150400.6.57.1, 2.4.66-150600.5.55.1, 2.4.66-150700.4.23.1
apache2-tls13-debugsource - update to 2.4.66-35.81.1
apache2-tls13-example-pages - update to 2.4.66-35.81.1
apache2-doc - addressed in versions 2.4.66-35.81.1, 2.4.66-150400.6.57.1
apache2-tls13-doc - update to 2.4.66-35.81.1
apache2-prefork-debuginfo - addressed in versions 2.4.66-35.81.1, 2.4.66-150400.6.57.1, 2.4.66-150600.5.55.1, 2.4.66-150700.4.23.1
apache2 - addressed in versions 2.4.66-35.81.1, 2.4.66-150400.6.57.1, 2.4.66-150600.5.55.1, 2.4.66-150700.4.23.1
apache2-tls13-prefork-debuginfo - update to 2.4.66-35.81.1
apache2-debuginfo - addressed in versions 2.4.66-35.81.1, 2.4.66-150400.6.57.1, 2.4.66-150600.5.55.1, 2.4.66-150700.4.23.1
apache2-tls13-utils-debuginfo - update to 2.4.66-35.81.1
apache2-prefork - addressed in versions 2.4.66-35.81.1, 2.4.66-150400.6.57.1, 2.4.66-150600.5.55.1, 2.4.66-150700.4.23.1
apache2-utils - addressed in versions 2.4.66-35.81.1, 2.4.66-150400.6.57.1, 2.4.66-150600.5.55.1, 2.4.66-150700.4.23.1
apache2-tls13 - update to 2.4.66-35.81.1
apache2-utils-debuginfo - addressed in versions 2.4.66-35.81.1, 2.4.66-150400.6.57.1, 2.4.66-150600.5.55.1, 2.4.66-150700.4.23.1
apache2-tls13-worker - update to 2.4.66-35.81.1
apache2-tls13-prefork - update to 2.4.66-35.81.1
apache2-tls13-utils - update to 2.4.66-35.81.1
apache2-worker-debuginfo - addressed in versions 2.4.66-35.81.1, 2.4.66-150400.6.57.1, 2.4.66-150600.5.55.1, 2.4.66-150700.4.23.1
apache2-tls13-debuginfo - update to 2.4.66-35.81.1
apache2-example-pages - addressed in versions 2.4.66-35.81.1, 2.4.66-150400.6.57.1
apache2-tls13-worker-debuginfo - update to 2.4.66-35.81.1
apache2-event - addressed in versions 2.4.66-150400.6.57.1, 2.4.66-150600.5.55.1, 2.4.66-150700.4.23.1
apache2-event-debuginfo - addressed in versions 2.4.66-150400.6.57.1, 2.4.66-150600.5.55.1, 2.4.66-150700.4.23.1
apache2-worker-debugsource - addressed in versions 2.4.66-150600.5.55.1, 2.4.66-150700.4.23.1
apache2-event-debugsource - addressed in versions 2.4.66-150600.5.55.1, 2.4.66-150700.4.23.1
apache2-utils-debugsource - addressed in versions 2.4.66-150600.5.55.1, 2.4.66-150700.4.23.1
apache2-prefork-debugsource - addressed in versions 2.4.66-150600.5.55.1, 2.4.66-150700.4.23.1
apache2-manual - addressed in versions 2.4.66-150600.5.55.1, 2.4.66-150700.4.23.1

• https://downloads.apache.org/httpd/CHANGES_2.4_2.4.68

• Multiple vulnerabilities in Apache HTTP Server
• SUSE update for apache2
• Red Hat Enterprise Linux 10 update for httpd
• SUSE update for apache2
• SUSE update for apache2
• SUSE update for apache2
• Ubuntu update for apache2
• Ubuntu update for apache2
• Red Hat Enterprise Linux 8 update for the httpd:2.4 module
• Anolis OS update for httpd:2.4 module
• Red Hat Enterprise Linux 10 update for httpd