# CVE-2026-29168: Apache HTTP Server: mod_md unrestricted OCSP response

CVE-2026-29168 is fixed in 34 products on 1 platform, first by apache2 2.4.66-2ubuntu2.1, released May 4, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-29168
- Priority: High
- CVSS: 7.5 (Moderate)
- EPSS: 0.0063
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 4, 2026
- Weakness: Allocation of Resources Without Limits or Throttling
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-29168

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | apache2 Debian 12.15 (bookworm) | 2.4.67-1~deb12u2 | [DEBIAN-CVE-2026-29168](https://patchblox.com/security/data/fix/linux/debian-cve-2026-29168.md) | May 15, 2026 |
| Linux | apache2 Debian 13.5 (trixie) | 2.4.67-1~deb13u2 | [DEBIAN-CVE-2026-29168](https://patchblox.com/security/data/fix/linux/debian-cve-2026-29168.md) | May 15, 2026 |
| Linux | apache2 Debian 14 | 2.4.67-1 | [DEBIAN-CVE-2026-29168](https://patchblox.com/security/data/fix/linux/debian-cve-2026-29168.md) | May 15, 2026 |
| Linux | apache2 Ubuntu 22.04.1 LTS (jammy) | 2.4.52-1ubuntu4.20 | [apache2 2.4.52-1ubuntu4.20](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-apache2-2.4.52-1ubuntu4.20.md) | May 15, 2026 |
| Linux | apache2 Ubuntu 24.04.5 LTS (noble) | 2.4.58-1ubuntu8.12 | [apache2 2.4.58-1ubuntu8.12](https://patchblox.com/security/data/fix/linux/ubuntu-noble-apache2-2.4.58-1ubuntu8.12.md) | May 15, 2026 |
| Linux | apache2 Ubuntu 25.10 (questing) | 2.4.64-1ubuntu3.4 | [apache2 2.4.64-1ubuntu3.4](https://patchblox.com/security/data/fix/linux/ubuntu-questing-apache2-2.4.64-1ubuntu3.4.md) | May 15, 2026 |
| Linux | apache2 Ubuntu 26.04.1 LTS (resolute) | 2.4.66-2ubuntu2.1 | [apache2 2.4.66-2ubuntu2.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-apache2-2.4.66-2ubuntu2.1.md) | May 4, 2026 |
| Linux | apache2 opensuse-leap 16.0 | 2.4.66-160000.2.1 | [OPENSUSE-SU-2026:21115-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21115-1.md) | Jun 20, 2026 |
| Linux | apache2 sles 16.0 | 2.4.66-160000.2.1 | [SUSE-SU-2026:22209-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-22209-1.md) | Jun 20, 2026 |
| Linux | apache2-bin Ubuntu 22.04.1 LTS (jammy) | 2.4.52-1ubuntu4.20 | [apache2-bin 2.4.52-1ubuntu4.20](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-apache2-bin-2.4.52-1ubuntu4.20.md) | May 15, 2026 |
| Linux | apache2-bin Ubuntu 24.04.5 LTS (noble) | 2.4.58-1ubuntu8.12 | [apache2-bin 2.4.58-1ubuntu8.12](https://patchblox.com/security/data/fix/linux/ubuntu-noble-apache2-bin-2.4.58-1ubuntu8.12.md) | May 15, 2026 |
| Linux | apache2-bin Ubuntu 25.10 (questing) | 2.4.64-1ubuntu3.4 | [apache2-bin 2.4.64-1ubuntu3.4](https://patchblox.com/security/data/fix/linux/ubuntu-questing-apache2-bin-2.4.64-1ubuntu3.4.md) | May 15, 2026 |
| Linux | apache2-bin Ubuntu 26.04.1 LTS (resolute) | 2.4.66-2ubuntu2.1 | [apache2-bin 2.4.66-2ubuntu2.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-apache2-bin-2.4.66-2ubuntu2.1.md) | May 4, 2026 |
| Linux | apache2-data Ubuntu 22.04.1 LTS (jammy) | 2.4.52-1ubuntu4.20 | [apache2-data 2.4.52-1ubuntu4.20](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-apache2-data-2.4.52-1ubuntu4.20.md) | May 15, 2026 |
| Linux | apache2-data Ubuntu 24.04.5 LTS (noble) | 2.4.58-1ubuntu8.12 | [apache2-data 2.4.58-1ubuntu8.12](https://patchblox.com/security/data/fix/linux/ubuntu-noble-apache2-data-2.4.58-1ubuntu8.12.md) | May 15, 2026 |
| Linux | apache2-data Ubuntu 25.10 (questing) | 2.4.64-1ubuntu3.4 | [apache2-data 2.4.64-1ubuntu3.4](https://patchblox.com/security/data/fix/linux/ubuntu-questing-apache2-data-2.4.64-1ubuntu3.4.md) | May 15, 2026 |
| Linux | apache2-data Ubuntu 26.04.1 LTS (resolute) | 2.4.66-2ubuntu2.1 | [apache2-data 2.4.66-2ubuntu2.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-apache2-data-2.4.66-2ubuntu2.1.md) | May 4, 2026 |
| Linux | apache2-devel opensuse-leap 16.0 | 2.4.66-160000.2.1 | [OPENSUSE-SU-2026:21115-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21115-1.md) | Jun 20, 2026 |
| Linux | apache2-devel sles 16.0 | 2.4.66-160000.2.1 | [SUSE-SU-2026:22209-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-22209-1.md) | Jun 20, 2026 |
| Linux | apache2-event opensuse-leap 16.0 | 2.4.66-160000.2.1 | [OPENSUSE-SU-2026:21115-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21115-1.md) | Jun 20, 2026 |
| Linux | apache2-event sles 16.0 | 2.4.66-160000.2.1 | [SUSE-SU-2026:22209-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-22209-1.md) | Jun 20, 2026 |
| Linux | apache2-manual opensuse-leap 16.0 | 2.4.66-160000.2.1 | [OPENSUSE-SU-2026:21115-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21115-1.md) | Jun 20, 2026 |
| Linux | apache2-manual sles 16.0 | 2.4.66-160000.2.1 | [SUSE-SU-2026:22209-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-22209-1.md) | Jun 20, 2026 |
| Linux | apache2-prefork opensuse-leap 16.0 | 2.4.66-160000.2.1 | [OPENSUSE-SU-2026:21115-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21115-1.md) | Jun 20, 2026 |
| Linux | apache2-prefork sles 16.0 | 2.4.66-160000.2.1 | [SUSE-SU-2026:22209-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-22209-1.md) | Jun 20, 2026 |
| Linux | apache2-suexec-custom Ubuntu 22.04.1 LTS (jammy) | 2.4.52-1ubuntu4.20 | [apache2-suexec-custom 2.4.52-1ubuntu4.20](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-apache2-suexec-custom-2.4.52-1ubuntu4.20.md) | May 15, 2026 |
| Linux | apache2-suexec-custom Ubuntu 24.04.5 LTS (noble) | 2.4.58-1ubuntu8.12 | [apache2-suexec-custom 2.4.58-1ubuntu8.12](https://patchblox.com/security/data/fix/linux/ubuntu-noble-apache2-suexec-custom-2.4.58-1ubuntu8.12.md) | May 15, 2026 |
| Linux | apache2-suexec-custom Ubuntu 25.10 (questing) | 2.4.64-1ubuntu3.4 | [apache2-suexec-custom 2.4.64-1ubuntu3.4](https://patchblox.com/security/data/fix/linux/ubuntu-questing-apache2-suexec-custom-2.4.64-1ubuntu3.4.md) | May 15, 2026 |
| Linux | apache2-suexec-custom Ubuntu 26.04.1 LTS (resolute) | 2.4.66-2ubuntu2.1 | [apache2-suexec-custom 2.4.66-2ubuntu2.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-apache2-suexec-custom-2.4.66-2ubuntu2.1.md) | May 4, 2026 |
| Linux | apache2-suexec-pristine Ubuntu 22.04.1 LTS (jammy) | 2.4.52-1ubuntu4.20 | [apache2-suexec-pristine 2.4.52-1ubuntu4.20](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-apache2-suexec-pristine-2.4.52-1ubuntu4.20.md) | May 15, 2026 |
| Linux | apache2-suexec-pristine Ubuntu 24.04.5 LTS (noble) | 2.4.58-1ubuntu8.12 | [apache2-suexec-pristine 2.4.58-1ubuntu8.12](https://patchblox.com/security/data/fix/linux/ubuntu-noble-apache2-suexec-pristine-2.4.58-1ubuntu8.12.md) | May 15, 2026 |
| Linux | apache2-suexec-pristine Ubuntu 25.10 (questing) | 2.4.64-1ubuntu3.4 | [apache2-suexec-pristine 2.4.64-1ubuntu3.4](https://patchblox.com/security/data/fix/linux/ubuntu-questing-apache2-suexec-pristine-2.4.64-1ubuntu3.4.md) | May 15, 2026 |
| Linux | apache2-suexec-pristine Ubuntu 26.04.1 LTS (resolute) | 2.4.66-2ubuntu2.1 | [apache2-suexec-pristine 2.4.66-2ubuntu2.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-apache2-suexec-pristine-2.4.66-2ubuntu2.1.md) | May 4, 2026 |
| Linux | apache2-utils Ubuntu 22.04.1 LTS (jammy) | 2.4.52-1ubuntu4.20 | [apache2-utils 2.4.52-1ubuntu4.20](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-apache2-utils-2.4.52-1ubuntu4.20.md) | May 15, 2026 |
| Linux | apache2-utils Ubuntu 24.04.5 LTS (noble) | 2.4.58-1ubuntu8.12 | [apache2-utils 2.4.58-1ubuntu8.12](https://patchblox.com/security/data/fix/linux/ubuntu-noble-apache2-utils-2.4.58-1ubuntu8.12.md) | May 15, 2026 |
| Linux | apache2-utils Ubuntu 25.10 (questing) | 2.4.64-1ubuntu3.4 | [apache2-utils 2.4.64-1ubuntu3.4](https://patchblox.com/security/data/fix/linux/ubuntu-questing-apache2-utils-2.4.64-1ubuntu3.4.md) | May 15, 2026 |
| Linux | apache2-utils Ubuntu 26.04.1 LTS (resolute) | 2.4.66-2ubuntu2.1 | [apache2-utils 2.4.66-2ubuntu2.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-apache2-utils-2.4.66-2ubuntu2.1.md) | May 4, 2026 |
| Linux | apache2-utils opensuse-leap 16.0 | 2.4.66-160000.2.1 | [OPENSUSE-SU-2026:21115-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21115-1.md) | Jun 20, 2026 |
| Linux | apache2-utils sles 16.0 | 2.4.66-160000.2.1 | [SUSE-SU-2026:22209-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-22209-1.md) | Jun 20, 2026 |
| Linux | apache2-worker opensuse-leap 16.0 | 2.4.66-160000.2.1 | [OPENSUSE-SU-2026:21115-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21115-1.md) | Jun 20, 2026 |
| Linux | apache2-worker sles 16.0 | 2.4.66-160000.2.1 | [SUSE-SU-2026:22209-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-22209-1.md) | Jun 20, 2026 |
| Linux | httpd amzn 2023 | 2.4.67-1.amzn2023.0.1 | [ALAS2023-2026-1720](https://patchblox.com/security/data/fix/linux/alas2023-2026-1720.md) | May 25, 2026 |
| Linux | httpd-core amzn 2023 | 2.4.67-1.amzn2023.0.1 | [ALAS2023-2026-1720](https://patchblox.com/security/data/fix/linux/alas2023-2026-1720.md) | May 25, 2026 |
| Linux | httpd-core-debuginfo amzn 2023 | 2.4.67-1.amzn2023.0.1 | [ALAS2023-2026-1720](https://patchblox.com/security/data/fix/linux/alas2023-2026-1720.md) | May 25, 2026 |
| Linux | httpd-debuginfo amzn 2023 | 2.4.67-1.amzn2023.0.1 | [ALAS2023-2026-1720](https://patchblox.com/security/data/fix/linux/alas2023-2026-1720.md) | May 25, 2026 |
| Linux | httpd-debugsource amzn 2023 | 2.4.67-1.amzn2023.0.1 | [ALAS2023-2026-1720](https://patchblox.com/security/data/fix/linux/alas2023-2026-1720.md) | May 25, 2026 |
| Linux | httpd-devel amzn 2023 | 2.4.67-1.amzn2023.0.1 | [ALAS2023-2026-1720](https://patchblox.com/security/data/fix/linux/alas2023-2026-1720.md) | May 25, 2026 |
| Linux | httpd-filesystem amzn 2023 | 2.4.67-1.amzn2023.0.1 | [ALAS2023-2026-1720](https://patchblox.com/security/data/fix/linux/alas2023-2026-1720.md) | May 25, 2026 |
| Linux | httpd-manual amzn 2023 | 2.4.67-1.amzn2023.0.1 | [ALAS2023-2026-1720](https://patchblox.com/security/data/fix/linux/alas2023-2026-1720.md) | May 25, 2026 |
| Linux | httpd-tools amzn 2023 | 2.4.67-1.amzn2023.0.1 | [ALAS2023-2026-1720](https://patchblox.com/security/data/fix/linux/alas2023-2026-1720.md) | May 25, 2026 |
| Linux | httpd-tools-debuginfo amzn 2023 | 2.4.67-1.amzn2023.0.1 | [ALAS2023-2026-1720](https://patchblox.com/security/data/fix/linux/alas2023-2026-1720.md) | May 25, 2026 |
| Linux | libapache2-mod-md Ubuntu 22.04.1 LTS (jammy) | 2.4.52-1ubuntu4.20 | [libapache2-mod-md 2.4.52-1ubuntu4.20](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libapache2-mod-md-2.4.52-1ubuntu4.20.md) | May 15, 2026 |
| Linux | libapache2-mod-md Ubuntu 24.04.5 LTS (noble) | 2.4.58-1ubuntu8.12 | [libapache2-mod-md 2.4.58-1ubuntu8.12](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libapache2-mod-md-2.4.58-1ubuntu8.12.md) | May 15, 2026 |
| Linux | libapache2-mod-proxy-uwsgi Ubuntu 22.04.1 LTS (jammy) | 2.4.52-1ubuntu4.20 | [libapache2-mod-proxy-uwsgi 2.4.52-1ubuntu4.20](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libapache2-mod-proxy-uwsgi-2.4.52-1ubuntu4.20.md) | May 15, 2026 |
| Linux | libapache2-mod-proxy-uwsgi Ubuntu 24.04.5 LTS (noble) | 2.4.58-1ubuntu8.12 | [libapache2-mod-proxy-uwsgi 2.4.58-1ubuntu8.12](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libapache2-mod-proxy-uwsgi-2.4.58-1ubuntu8.12.md) | May 15, 2026 |
| Linux | mod_ldap amzn 2023 | 2.4.67-1.amzn2023.0.1 | [ALAS2023-2026-1720](https://patchblox.com/security/data/fix/linux/alas2023-2026-1720.md) | May 25, 2026 |
| Linux | mod_ldap-debuginfo amzn 2023 | 2.4.67-1.amzn2023.0.1 | [ALAS2023-2026-1720](https://patchblox.com/security/data/fix/linux/alas2023-2026-1720.md) | May 25, 2026 |
| Linux | mod_lua amzn 2023 | 2.4.67-1.amzn2023.0.1 | [ALAS2023-2026-1720](https://patchblox.com/security/data/fix/linux/alas2023-2026-1720.md) | May 25, 2026 |
| Linux | mod_lua-debuginfo amzn 2023 | 2.4.67-1.amzn2023.0.1 | [ALAS2023-2026-1720](https://patchblox.com/security/data/fix/linux/alas2023-2026-1720.md) | May 25, 2026 |
| Linux | mod_md RHEL 10 | 2.4.26-3.el10_0.2 | [RHSA-2026:52393](https://patchblox.com/security/data/fix/linux/rhsa-2026-52393.md) | May 5, 2026 |
| Linux | mod_md RHEL 9 | 1:2.4.26-2.el9_8.1 | [RHSA-2026:30844](https://patchblox.com/security/data/fix/linux/rhsa-2026-30844.md) | Jun 29, 2026 |
| Linux | mod_md almalinux 10 | 1:2.4.26-5.el10_2.1 | [ALSA-2026:30845](https://patchblox.com/security/data/fix/linux/alsa-2026-30845.md) | Jun 29, 2026 |
| Linux | mod_md almalinux 9 | 1:2.4.26-2.el9_8.1 | [ALSA-2026:30844](https://patchblox.com/security/data/fix/linux/alsa-2026-30844.md) | Jun 29, 2026 |
| Linux | mod_md ol 10 | 1:2.4.26-5.el10_2.1 | [ELSA-2026-30845](https://patchblox.com/security/data/fix/linux/elsa-2026-30845.md) | Jul 16, 2026 |
| Linux | mod_md ol 9 | 1:2.4.26-2.el9_8.1 | [ELSA-2026-30844](https://patchblox.com/security/data/fix/linux/elsa-2026-30844.md) | Jun 29, 2026 |
| Linux | mod_md rocky 10 | 1:2.4.26-5.el10_2.1 | [RLSA-2026:30845](https://patchblox.com/security/data/fix/linux/rlsa-2026-30845.md) | Jul 5, 2026 |
| Linux | mod_md rocky 9 | 1:2.4.26-2.el9_8.1 | [RLSA-2026:30844](https://patchblox.com/security/data/fix/linux/rlsa-2026-30844.md) | Jul 1, 2026 |
| Linux | mod_proxy_html amzn 2023 | 1:2.4.67-1.amzn2023.0.1 | [ALAS2023-2026-1720](https://patchblox.com/security/data/fix/linux/alas2023-2026-1720.md) | May 25, 2026 |
| Linux | mod_proxy_html-debuginfo amzn 2023 | 1:2.4.67-1.amzn2023.0.1 | [ALAS2023-2026-1720](https://patchblox.com/security/data/fix/linux/alas2023-2026-1720.md) | May 25, 2026 |
| Linux | mod_session amzn 2023 | 2.4.67-1.amzn2023.0.1 | [ALAS2023-2026-1720](https://patchblox.com/security/data/fix/linux/alas2023-2026-1720.md) | May 25, 2026 |
| Linux | mod_session-debuginfo amzn 2023 | 2.4.67-1.amzn2023.0.1 | [ALAS2023-2026-1720](https://patchblox.com/security/data/fix/linux/alas2023-2026-1720.md) | May 25, 2026 |
| Linux | mod_ssl amzn 2023 | 1:2.4.67-1.amzn2023.0.1 | [ALAS2023-2026-1720](https://patchblox.com/security/data/fix/linux/alas2023-2026-1720.md) | May 25, 2026 |
| Linux | mod_ssl-debuginfo amzn 2023 | 1:2.4.67-1.amzn2023.0.1 | [ALAS2023-2026-1720](https://patchblox.com/security/data/fix/linux/alas2023-2026-1720.md) | May 25, 2026 |

---

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