CVE-2026-29168

EUVD-2026-27321
Allocation of Resources Without Limits or Throttling vulnerability in Apache HTTP Server's  mod_md via OCSP response data.

This issue affects Apache HTTP Server: from 2.4.30 through 2.4.66.

Users are recommended to upgrade to version 2.4.67, which fixes the issue.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.3 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Base Score
CVSS 3.x
EPSS Score
Percentile: 45%
Affected Products (NVD)
VendorProductVersion
apachehttp_server
2.4.30 ≤
𝑥
< 2.4.67
𝑥
= Vulnerable software versions
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
apache2
bionic
not-affected
focal
not-affected
jammy
Fixed 2.4.52-1ubuntu4.20
released
noble
Fixed 2.4.58-1ubuntu8.12
released
questing
Fixed 2.4.64-1ubuntu3.4
released
resolute
Fixed 2.4.66-2ubuntu2.1
released
trusty
not-affected
xenial
not-affected
openSUSE logo
openSUSE / SLES Releases
openSUSE Product
Release
apache2
suse enterprise desktop 15 SP7
2.4.66-150700.4.20.1
fixed
suse enterprise sap 15 SP7
2.4.66-150700.4.20.1
fixed
suse enterprise server 15 SP6
2.4.66-150600.5.52.1
fixed
suse enterprise server 15 SP7
2.4.66-150700.4.20.1
fixed
apache2-devel
suse enterprise sap 15 SP7
2.4.66-150700.4.20.1
fixed
suse enterprise server 15 SP6
2.4.66-150600.5.52.1
fixed
suse enterprise server 15 SP7
2.4.66-150700.4.20.1
fixed
apache2-manual
suse enterprise sap 15 SP7
2.4.66-150700.4.20.1
fixed
suse enterprise server 15 SP6
2.4.66-150600.5.52.1
fixed
suse enterprise server 15 SP7
2.4.66-150700.4.20.1
fixed
apache2-prefork
suse enterprise desktop 15 SP7
2.4.66-150700.4.20.1
fixed
suse enterprise sap 15 SP7
2.4.66-150700.4.20.1
fixed
suse enterprise server 15 SP6
2.4.66-150600.5.52.1
fixed
suse enterprise server 15 SP7
2.4.66-150700.4.20.1
fixed
apache2-utils
suse enterprise sap 15 SP7
2.4.66-150700.4.20.1
fixed
suse enterprise server 15 SP6
2.4.66-150600.5.52.1
fixed
suse enterprise server 15 SP7
2.4.66-150700.4.20.1
fixed
apache2-worker
suse enterprise sap 15 SP7
2.4.66-150700.4.20.1
fixed
suse enterprise server 15 SP6
2.4.66-150600.5.52.1
fixed
suse enterprise server 15 SP7
2.4.66-150700.4.20.1
fixed
Amazon Linux logo
Amazon Linux Releases
Amazon Package
Release
httpd
Amazon Linux 2
0:2.4.67-1.amzn2.0.1
fixed
Amazon Linux 2023
0:2.4.67-1.amzn2023.0.1
fixed
httpd-core
Amazon Linux 2023
0:2.4.67-1.amzn2023.0.1
fixed
httpd-core-debuginfo
Amazon Linux 2023
0:2.4.67-1.amzn2023.0.1
fixed
httpd-debuginfo
Amazon Linux 2
0:2.4.67-1.amzn2.0.1
fixed
Amazon Linux 2023
0:2.4.67-1.amzn2023.0.1
fixed
httpd-debugsource
Amazon Linux 2023
0:2.4.67-1.amzn2023.0.1
fixed
httpd-devel
Amazon Linux 2
0:2.4.67-1.amzn2.0.1
fixed
Amazon Linux 2023
0:2.4.67-1.amzn2023.0.1
fixed
httpd-filesystem
Amazon Linux 2
0:2.4.67-1.amzn2.0.1
fixed
Amazon Linux 2023
0:2.4.67-1.amzn2023.0.1
fixed
httpd-manual
Amazon Linux 2
0:2.4.67-1.amzn2.0.1
fixed
Amazon Linux 2023
0:2.4.67-1.amzn2023.0.1
fixed
httpd-tools
Amazon Linux 2
0:2.4.67-1.amzn2.0.1
fixed
Amazon Linux 2023
0:2.4.67-1.amzn2023.0.1
fixed
httpd-tools-debuginfo
Amazon Linux 2023
0:2.4.67-1.amzn2023.0.1
fixed
mod_ldap
Amazon Linux 2
0:2.4.67-1.amzn2.0.1
fixed
Amazon Linux 2023
0:2.4.67-1.amzn2023.0.1
fixed
mod_ldap-debuginfo
Amazon Linux 2023
0:2.4.67-1.amzn2023.0.1
fixed
mod_lua
Amazon Linux 2023
0:2.4.67-1.amzn2023.0.1
fixed
mod_lua-debuginfo
Amazon Linux 2023
0:2.4.67-1.amzn2023.0.1
fixed
mod_md
Amazon Linux 2
0:2.4.67-1.amzn2.0.1
fixed
mod_proxy_html
Amazon Linux 2
1:2.4.67-1.amzn2.0.1
fixed
Amazon Linux 2023
1:2.4.67-1.amzn2023.0.1
fixed
mod_proxy_html-debuginfo
Amazon Linux 2023
1:2.4.67-1.amzn2023.0.1
fixed
mod_session
Amazon Linux 2
0:2.4.67-1.amzn2.0.1
fixed
Amazon Linux 2023
0:2.4.67-1.amzn2023.0.1
fixed
mod_session-debuginfo
Amazon Linux 2023
0:2.4.67-1.amzn2023.0.1
fixed
mod_ssl
Amazon Linux 2
1:2.4.67-1.amzn2.0.1
fixed
Amazon Linux 2023
1:2.4.67-1.amzn2023.0.1
fixed
mod_ssl-debuginfo
Amazon Linux 2023
1:2.4.67-1.amzn2023.0.1
fixed
Azure Linux logo
Azure Linux Releases
Azure Package
Release
httpd
Azure Linux 3.0
0:2.4.67-1.azl3
fixed
Common Weakness Enumeration
Vulnerability Media Exposure
References
https://httpd.apache.org/security/vulnerabilities_24.html
http://www.openwall.com/lists/oss-security/2026/05/05/6