Path traversal in Apache HTTP Server - CVE-2026-42535

Vulnerability identifier: #VU133904

CSH Severity: Low

CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-42535

CWE-ID: CWE-22

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote user to cause a denial of service.

The vulnerability exists due to improper path handling in mod_dav_fs when a WebDAV content author directly manipulates trusted DAV property databases. A remote user can manipulate trusted DAV property databases to cause a denial of service.

The issue may cause child process crashes.

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
Gentoo Linux
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Real Time 15
Anolis OS
Ubuntu
Server Applications Module
Basesystem Module
SUSE Package Hub 15
openSUSE Leap
openEuler
IBM Cloud Pak System
WebSphere Remote Server
IBM Rational ClearQuest
IBM OpenPages with Watson
mod_http2
mod_md
httpd
httpd-devel
httpd-tools
mod_ldap
mod_proxy_html
mod_session
mod_ssl
httpd-filesystem
httpd-manual
httpd-debugsource
httpd-debuginfo
httpd-help
apache2-tls13-worker-debuginfo
apache2-debugsource
apache2-devel
apache2-example-pages
apache2-tls13-debuginfo
apache2-worker-debuginfo
apache2-tls13-utils
apache2-tls13-prefork
apache2-tls13-worker
apache2-utils-debuginfo
apache2-tls13
apache2-utils
apache2-prefork
apache2-tls13-utils-debuginfo
apache2-debuginfo
apache2-tls13-prefork-debuginfo
apache2
apache2-prefork-debuginfo
apache2-tls13-doc
apache2-doc
apache2-tls13-debugsource
apache2-worker
apache2-tls13-devel
apache2-tls13-example-pages
apache2-event-debuginfo
apache2-event
apache2-manual
apache2-prefork-debugsource
apache2-worker-debugsource
apache2-event-debugsource
apache2-utils-debugsource
httpd-doc
mod_lua
httpd-core
www-servers/apache
apache2 (Ubuntu package)

Install security update from vendor's website.

Apache HTTP Server - update to 2.4.68
IBM Cloud Pak System - update to 2.3.6.2
mod_http2 - update to 1.15.7-10
mod_md - update to 2.0.8-8
httpd - addressed in versions 2.4.37-655.0.1, 2.4.68-1
httpd-devel - addressed in versions 2.4.37-655.0.1, 2.4.68-1
httpd-tools - addressed in versions 2.4.37-655.0.1, 2.4.68-1
mod_ldap - addressed in versions 2.4.37-655.0.1, 2.4.68-1
mod_proxy_html - addressed in versions 2.4.37-655.0.1, 2.4.68-1
mod_session - addressed in versions 2.4.37-655.0.1, 2.4.68-1
mod_ssl - addressed in versions 2.4.37-655.0.1, 2.4.68-1
httpd-filesystem - addressed in versions 2.4.37-655.0.1, 2.4.68-1
httpd-manual - addressed in versions 2.4.37-655.0.1, 2.4.68-1
mod_ldap - addressed in versions 2.4.43-37, 2.4.51-33, 2.4.58-20
mod_md - addressed in versions 2.4.43-37, 2.4.51-33, 2.4.58-20
httpd-tools - addressed in versions 2.4.43-37, 2.4.51-33, 2.4.58-20
httpd-devel - addressed in versions 2.4.43-37, 2.4.51-33, 2.4.58-20
httpd-debugsource - addressed in versions 2.4.43-37, 2.4.51-33, 2.4.58-20
httpd-debuginfo - addressed in versions 2.4.43-37, 2.4.51-33, 2.4.58-20
httpd - addressed in versions 2.4.43-37, 2.4.51-33, 2.4.58-20
mod_proxy_html - addressed in versions 2.4.43-37, 2.4.51-33, 2.4.58-20
mod_session - addressed in versions 2.4.43-37, 2.4.51-33, 2.4.58-20
mod_ssl - addressed in versions 2.4.43-37, 2.4.51-33, 2.4.58-20
httpd-filesystem - addressed in versions 2.4.43-37, 2.4.51-33, 2.4.58-20
httpd-help - addressed in versions 2.4.43-37, 2.4.51-33, 2.4.58-20
apache2-tls13-worker-debuginfo - update to 2.4.66-35.81.1
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-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-example-pages - addressed in versions 2.4.66-35.81.1, 2.4.66-150400.6.57.1
apache2-tls13-debuginfo - 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-utils - update to 2.4.66-35.81.1
apache2-tls13-prefork - update to 2.4.66-35.81.1
apache2-tls13-worker - 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 - update to 2.4.66-35.81.1
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-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-tls13-utils-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-prefork-debuginfo - update to 2.4.66-35.81.1
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-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-tls13-doc - 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-debugsource - 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-tls13-devel - update to 2.4.66-35.81.1
apache2-tls13-example-pages - update to 2.4.66-35.81.1
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-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-manual - 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-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
httpd-doc - update to 2.4.68-1
mod_lua - update to 2.4.68-1
httpd-core - update to 2.4.68-1
www-servers/apache - update to 2.4.68
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, 2.4.41-4ubuntu3.23+esm7, 2.4.52-1ubuntu4.23, 2.4.58-1ubuntu8.15, 2.4.66-2ubuntu2.4

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

• Multiple vulnerabilities in Apache HTTP Server
• Multiple vulnerabilities in IBM WebSphere Remote Server
• openEuler 24.03 LTS SP3 update for httpd
• openEuler 24.03 LTS SP1 update for httpd
• openEuler 22.03 LTS SP4 update for httpd
• openEuler 20.03 LTS SP4 update for httpd
• Anolis OS update for httpd
• SUSE update for apache2
• SUSE update for apache2
• SUSE update for apache2
• SUSE update for apache2
• Ubuntu update for apache2
• Ubuntu update for apache2
• Multiple vulnerabilities in IBM Rational ClearQuest
• Gentoo update for Apache HTTPD
• Multiple vulnerabilities in IBM OpenPages
• Anolis OS update for httpd module
• Ubuntu update for apache2
• Multiple vulnerabilities in IBM Cloud Pak System