RHEL 9 : mod_md (RHSA-2026:0094)

high Nessus Plugin ID 281858

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Synopsis

The remote Red Hat host is missing a security update for mod_md.

Description

The remote Redhat Enterprise Linux 9 host has a package installed that is affected by a vulnerability as referenced in the RHSA-2026:0094 advisory.

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):

* mod_md: Apache HTTP Server: mod_md (ACME), unintended retry intervals (CVE-2025-55753)

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.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the RHEL mod_md package based on the guidance in RHSA-2026:0094.

Plugin Details

Severity: High

ID: 281858

File Name: redhat-RHSA-2026-0094.nasl

Version: 1.1

Type: local

Agent: unix

Family: Red Hat Local Security Checks

Published: 1/6/2026

Updated: 1/6/2026

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

Vendor

Vendor Severity: Important

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:N/A:N

CVSS Score Source: CVE-2025-55753

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:redhat:rhel_eus:9.6, p-cpe:/a:redhat:enterprise_linux:mod_md

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu

Exploit Ease: No known exploits are available

Patch Publication Date: 1/6/2026

Vulnerability Publication Date: 12/4/2025

Reference Information

CVE: CVE-2025-55753

CWE: 190

RHSA: 2026:0094

Detections

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