Vulnerability · Published May 5, 2026 · Assigned by apache
CVE-2026-29168Apache HTTP Server: mod_md unrestricted OCSP response
High 7.3
In plain English
A high-severity resource allocation without limits in Apache HTTP Server from Apache Software Foundation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 50% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:10 | mod_md | 1:2.4.26-5.el10_2.1 | ALSA-2026:30845 |
| AlmaLinux:9 | mod_md | 1:2.4.26-2.el9_8.1 | ALSA-2026:30844 |
| Alpine:v3.20 | apache2 | 2.4.67-r0 | ALPINE-CVE-2026-29168 |
| Alpine:v3.21 | apache2 | 2.4.67-r0 | ALPINE-CVE-2026-29168 |
| Alpine:v3.22 | apache2 | 2.4.67-r0 | ALPINE-CVE-2026-29168 |
| Alpine:v3.23 | apache2 | 2.4.67-r0 | ALPINE-CVE-2026-29168 |
| Alpine:v3.24 | apache2 | 2.4.67-r0 | ALPINE-CVE-2026-29168 |
| Debian:12 | apache2 | 2.4.67-1~deb12u2 | DEBIAN-CVE-2026-29168 |
| Debian:13 | apache2 | 2.4.67-1~deb13u2 | DEBIAN-CVE-2026-29168 |
| Debian:14 | apache2 | 2.4.67-1 | DEBIAN-CVE-2026-29168 |
| Rocky Linux:10 | mod_md | 1:2.4.26-5.el10_2.1 | RLSA-2026:30845 |
| Rocky Linux:9 | mod_md | 1:2.4.26-2.el9_8.1 | RLSA-2026:30844 |
| Ubuntu:22.04:LTS | apache2 | 2.4.52-1ubuntu4.20 | UBUNTU-CVE-2026-29168 |
| Ubuntu:24.04:LTS | apache2 | 2.4.58-1ubuntu8.12 | UBUNTU-CVE-2026-29168 |
| Ubuntu:25.10 | apache2 | 2.4.64-1ubuntu3.4 | UBUNTU-CVE-2026-29168 |
| Ubuntu:26.04:LTS | apache2 | 2.4.66-2ubuntu2.1 | UBUNTU-CVE-2026-29168 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Apache Software Foundation | Apache HTTP Server | 2.4.30 – through 2.4.66 |
Weakness: CWE-770 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L