Vulnerability-Lookup

ALSA-2026:30845

Vulnerability from osv_almalinux – Published: 2026-06-29 00:00 – Updated: 2026-06-30 10:39 – Source website

Summary

Moderate: mod_md security update

Details

This module manages common properties of domains for one or more virtual hosts. Specifically it can use the ACME protocol to automate certificate provisioning. Certificates will be configured for managed domains and their virtual hosts automatically, including at renewal.

Security Fix(es):

httpd: mod_md: unrestricted OCSP response leads to resource exhaustion (CVE-2026-29168)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

References

URL

Type

	https://access.redhat.com/errata/RHSA-2026:30845	ADVISORY
	https://access.redhat.com/security/cve/CVE-2026-29168	REPORT
	https://bugzilla.redhat.com/2466753	REPORT
	https://errata.almalinux.org/10/ALSA-2026-30845.html	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "mod_md"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:2.4.26-5.el10_2.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "This module manages common properties of domains for one or more virtual hosts. Specifically it can use the ACME protocol to automate certificate provisioning. Certificates will be configured for managed domains and their virtual hosts automatically, including at renewal.  \n\nSecurity Fix(es):  \n\n  * httpd: mod_md: unrestricted OCSP response leads to resource exhaustion (CVE-2026-29168)\n\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n",
  "id": "ALSA-2026:30845",
  "modified": "2026-06-30T10:39:33Z",
  "published": "2026-06-29T00:00:00Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:30845"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-29168"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2466753"
    },
    {
      "type": "ADVISORY",
      "url": "https://errata.almalinux.org/10/ALSA-2026-30845.html"
    }
  ],
  "related": [
    "CVE-2026-29168"
  ],
  "summary": "Moderate: mod_md security update"
}

CVE-2026-29168 (GCVE-0-2026-29168)

Vulnerability from cvelistv5 – Published: 2026-05-05 13:10 – Updated: 2026-05-05 16:31

Title

Apache HTTP Server: mod_md unrestricted OCSP response

Summary

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.

Severity

7.3 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-05 15:34 UTC

CWE

CWE-770 - Allocation of Resources Without Limits or Throttling

Assigner

apache mitre root

References

2 references

URL	Tags
https://httpd.apache.org/security/vulnerabilities…	vendor-advisory
http://www.openwall.com/lists/oss-security/2026/05/05/6

Impacted products

1 product

Vendor	Product	Version
Apache Software Foundation	Apache HTTP Server	Affected: 2.4.30 , ≤ 2.4.66 (semver) cpe:2.3:a:apache:http_server::::::::

Credits

Pavel Kohout, Aisle Research, Aisle.com

Show details on NVD website

JSON

To clipboard

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  "containers": {
    "adp": [
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        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "LOW",
              "baseScore": 7.3,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "LOW",
              "integrityImpact": "LOW",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
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          },
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                  },
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                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-05T15:34:50.597190Z",
                "version": "2.0.3"
              },
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            }
          }
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            "cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*"
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          "time": "2026-05-04T12:00:00.000Z",
          "value": "fixed in 2.4.x by r1933352"
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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
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Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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Action not permitted

ALSA-2026:30845

CVE-2026-29168 (GCVE-0-2026-29168)

Tags

Sightings

Nomenclature

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