RHSA-2026:52390: Important: osbuild-composer security update

Published Aug 10, 2026
·
Updated

An image building service based on osbuild It is inspired by lorax-composer and exposes the same API. As such, it is a drop-in replacement.Security Fix(es): net/url: Incorrect parsing of IPv6 host literals in net/url (CVE-2026-25679) 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.

Other sources

Important: osbuild-composer security update

— Red Hat

Affected Software

11 affected componentsFixes available
Red Hat Red Hat Enterprise Linux Server - AUS
Red Hat Red Hat Enterprise Linux for x86_64 - Extended Life Cycle Long Life
redhat/osbuild-composer<28.7-6.el8_4
28.7-6.el8_4
redhat/osbuild-composer<28.7-6.el8_4
28.7-6.el8_4
redhat/osbuild-composer-core<28.7-6.el8_4
28.7-6.el8_4
redhat/osbuild-composer-core-debuginfo<28.7-6.el8_4
28.7-6.el8_4
redhat/osbuild-composer-debuginfo<28.7-6.el8_4
28.7-6.el8_4
redhat/osbuild-composer-debugsource<28.7-6.el8_4
28.7-6.el8_4
redhat/osbuild-composer-tests-debuginfo<28.7-6.el8_4
28.7-6.el8_4
redhat/osbuild-composer-worker<28.7-6.el8_4
28.7-6.el8_4
redhat/osbuild-composer-worker-debuginfo<28.7-6.el8_4
28.7-6.el8_4

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade redhat/osbuild-composer to a version that resolves this vulnerability.

    Fixed in 28.7-6.el8_4
  2. Upgrade

    Upgrade redhat/osbuild-composer-core to a version that resolves this vulnerability.

    Fixed in 28.7-6.el8_4
  3. Upgrade

    Upgrade redhat/osbuild-composer-core-debuginfo to a version that resolves this vulnerability.

    Fixed in 28.7-6.el8_4
  4. Upgrade

    Upgrade redhat/osbuild-composer-debuginfo to a version that resolves this vulnerability.

    Fixed in 28.7-6.el8_4
  5. Upgrade

    Upgrade redhat/osbuild-composer-debugsource to a version that resolves this vulnerability.

    Fixed in 28.7-6.el8_4
  6. Upgrade

    Upgrade redhat/osbuild-composer-tests-debuginfo to a version that resolves this vulnerability.

    Fixed in 28.7-6.el8_4
  7. Upgrade

    Upgrade redhat/osbuild-composer-worker to a version that resolves this vulnerability.

    Fixed in 28.7-6.el8_4
  8. Upgrade

    Upgrade redhat/osbuild-composer-worker-debuginfo to a version that resolves this vulnerability.

    Fixed in 28.7-6.el8_4
  9. Upgrade

    Upgrade osbuild-composer to a version that resolves this vulnerability.

    Patch CVE-2026-25679

Event History

Aug 10, 2026
Advisory Published
via Red Hat·12:00 AM
Data Sourced
via Red Hat·12:00 AM
RemedyDescriptionAffected Software
Advisory Published
via Red Hat·12:55 AM
Data Sourced
via Red Hat·12:55 AM
Severity
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Frequently Asked Questions

1

What is the severity of RHSA-2026:52390?

The severity of RHSA-2026:52390 is rated as high, with a score of 7.

2

How do I fix RHSA-2026:52390?

To fix RHSA-2026:52390, you should apply the latest security update for osbuild-composer.

3

What vulnerabilities does RHSA-2026:52390 address?

RHSA-2026:52390 addresses an issue with incorrect parsing of IPv6 host literals in net/url identified as CVE-2026-25679.

4

Which software packages are affected by RHSA-2026:52390?

Affected software packages include redhat/osbuild-composer and its related components.

5

When was RHSA-2026:52390 published?

RHSA-2026:52390 was published on August 10, 2026.

Company

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