RHEL 8 : osbuild-composer (RHSA-2026:1025)

medium Nessus Plugin ID 295329

Synopsis

The remote Red Hat host is missing a security update for osbuild-composer.

Description

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2026:1025 advisory.

A service for building customized OS artifacts, such as VM images and OSTree commits, that uses osbuild under the hood. Besides building images for local usage, it can also upload images directly to cloud. It is compatible with composer-cli and cockpit-composer clients.

Security Fix(es):

* golang: archive/tar: Unbounded allocation when parsing GNU sparse map (CVE-2025-58183)

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 osbuild-composer package based on the guidance in RHSA-2026:1025.

Plugin Details

Severity: Medium

ID: 295329

File Name: redhat-RHSA-2026-1025.nasl

Version: 1.1

Type: local

Agent: unix

Family: Red Hat Local Security Checks

Published: 1/22/2026

Updated: 1/22/2026

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

Risk Information

VPR

Risk Factor: Low

Score: 2.2

Vendor

Vendor Severity: Moderate

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2025-58183

CVSS v3

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.8

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

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

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:osbuild-composer, p-cpe:/a:redhat:enterprise_linux:osbuild-composer-core, cpe:/o:redhat:rhel_e4s:8.6, cpe:/o:redhat:rhel_aus:8.6, p-cpe:/a:redhat:enterprise_linux:osbuild-composer-worker, cpe:/o:redhat:rhel_tus:8.6, p-cpe:/a:redhat:enterprise_linux:osbuild-composer-dnf-json

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: 1/22/2026

Vulnerability Publication Date: 10/23/2025

Reference Information

CVE: CVE-2025-58183

CWE: 770

RHSA: 2026:1025

Detections

Analytics