RHSA-2026:57914: Important: Red Hat build of MicroShift 4.18.54 security update

Published Aug 26, 2026
·
Updated

Important: Red Hat build of MicroShift 4.18.54 security update

Other sources

Red Hat build of MicroShift is Red Hat's light-weight Kubernetesorchestration solution designed for edge device deployments and is builtfrom the edge capabilities of Red Hat OpenShift Container Platform.MicroShift is an application that is deployed on top of Red Hat EnterpriseLinux devices at the edge, providing an efficient way to operatesingle-node clusters in these low-resource environments.This advisory contains the RPM packages for Red Hat build of MicroShift4.18.54. Read the following advisory for the container images for thisrelease:https://access.redhat.com/errata/RHSA-2026:57487 Security Fix(es): net/mail: golang: Go net/mail: Denial of Service via crafted email inputs (CVE-2026-39820) net/mail: golang: net/mail: Denial of Service via pathological email address parsing (CVE-2026-42499)All Red Hat build of MicroShift 4.18 users are advised to use these updatedpackages and images when they are available in the RPM repository.

— Red Hat

Affected Software

22 affected componentsFixes available
Red Hat Red Hat OpenShift Container Platform for Power
Red Hat Red Hat OpenShift Container Platform for IBM Z and LinuxONE
Red Hat Red Hat OpenShift Container Platform
Red Hat Red Hat OpenShift Container Platform for ARM 64
redhat/microshift<4.18.54-202608211117.p0.g8eb6c29.assembly.4.18.54.el9
4.18.54-202608211117.p0.g8eb6c29.assembly.4.18.54.el9
redhat/microshift<4.18.54-202608211117.p0.g8eb6c29.assembly.4.18.54.el9
4.18.54-202608211117.p0.g8eb6c29.assembly.4.18.54.el9
redhat/microshift-gateway-api<4.18.54-202608211117.p0.g8eb6c29.assembly.4.18.54.el9
4.18.54-202608211117.p0.g8eb6c29.assembly.4.18.54.el9
redhat/microshift-gateway-api-release-info<4.18.54-202608211117.p0.g8eb6c29.assembly.4.18.54.el9
4.18.54-202608211117.p0.g8eb6c29.assembly.4.18.54.el9
redhat/microshift-greenboot<4.18.54-202608211117.p0.g8eb6c29.assembly.4.18.54.el9
4.18.54-202608211117.p0.g8eb6c29.assembly.4.18.54.el9
redhat/microshift-low-latency<4.18.54-202608211117.p0.g8eb6c29.assembly.4.18.54.el9
4.18.54-202608211117.p0.g8eb6c29.assembly.4.18.54.el9
redhat/microshift-multus<4.18.54-202608211117.p0.g8eb6c29.assembly.4.18.54.el9
4.18.54-202608211117.p0.g8eb6c29.assembly.4.18.54.el9
redhat/microshift-multus-release-info<4.18.54-202608211117.p0.g8eb6c29.assembly.4.18.54.el9
4.18.54-202608211117.p0.g8eb6c29.assembly.4.18.54.el9
redhat/microshift-networking<4.18.54-202608211117.p0.g8eb6c29.assembly.4.18.54.el9
4.18.54-202608211117.p0.g8eb6c29.assembly.4.18.54.el9
redhat/microshift-olm<4.18.54-202608211117.p0.g8eb6c29.assembly.4.18.54.el9
4.18.54-202608211117.p0.g8eb6c29.assembly.4.18.54.el9
redhat/microshift-olm-release-info<4.18.54-202608211117.p0.g8eb6c29.assembly.4.18.54.el9
4.18.54-202608211117.p0.g8eb6c29.assembly.4.18.54.el9
redhat/microshift-release-info<4.18.54-202608211117.p0.g8eb6c29.assembly.4.18.54.el9
4.18.54-202608211117.p0.g8eb6c29.assembly.4.18.54.el9
redhat/microshift-selinux<4.18.54-202608211117.p0.g8eb6c29.assembly.4.18.54.el9
4.18.54-202608211117.p0.g8eb6c29.assembly.4.18.54.el9
redhat/microshift<4.18.54-202608211117.p0.g8eb6c29.assembly.4.18.54.el9.aa
4.18.54-202608211117.p0.g8eb6c29.assembly.4.18.54.el9.aa
redhat/microshift-gateway-api<4.18.54-202608211117.p0.g8eb6c29.assembly.4.18.54.el9.aa
4.18.54-202608211117.p0.g8eb6c29.assembly.4.18.54.el9.aa
redhat/microshift-multus<4.18.54-202608211117.p0.g8eb6c29.assembly.4.18.54.el9.aa
4.18.54-202608211117.p0.g8eb6c29.assembly.4.18.54.el9.aa
redhat/microshift-networking<4.18.54-202608211117.p0.g8eb6c29.assembly.4.18.54.el9.aa
4.18.54-202608211117.p0.g8eb6c29.assembly.4.18.54.el9.aa
redhat/microshift-olm<4.18.54-202608211117.p0.g8eb6c29.assembly.4.18.54.el9.aa
4.18.54-202608211117.p0.g8eb6c29.assembly.4.18.54.el9.aa

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade redhat/microshift to a version that resolves this vulnerability.

    Fixed in 4.18.54-202608211117.p0.g8eb6c29.assembly.4.18.54.el9
  2. Upgrade

    Upgrade redhat/microshift-gateway-api to a version that resolves this vulnerability.

    Fixed in 4.18.54-202608211117.p0.g8eb6c29.assembly.4.18.54.el9
  3. Upgrade

    Upgrade redhat/microshift-gateway-api-release-info to a version that resolves this vulnerability.

    Fixed in 4.18.54-202608211117.p0.g8eb6c29.assembly.4.18.54.el9
  4. Upgrade

    Upgrade redhat/microshift-greenboot to a version that resolves this vulnerability.

    Fixed in 4.18.54-202608211117.p0.g8eb6c29.assembly.4.18.54.el9
  5. Upgrade

    Upgrade redhat/microshift-low-latency to a version that resolves this vulnerability.

    Fixed in 4.18.54-202608211117.p0.g8eb6c29.assembly.4.18.54.el9
  6. Upgrade

    Upgrade redhat/microshift-multus to a version that resolves this vulnerability.

    Fixed in 4.18.54-202608211117.p0.g8eb6c29.assembly.4.18.54.el9
  7. Upgrade

    Upgrade redhat/microshift-multus-release-info to a version that resolves this vulnerability.

    Fixed in 4.18.54-202608211117.p0.g8eb6c29.assembly.4.18.54.el9
  8. Upgrade

    Upgrade redhat/microshift-networking to a version that resolves this vulnerability.

    Fixed in 4.18.54-202608211117.p0.g8eb6c29.assembly.4.18.54.el9
  9. Upgrade

    Upgrade redhat/microshift-olm to a version that resolves this vulnerability.

    Fixed in 4.18.54-202608211117.p0.g8eb6c29.assembly.4.18.54.el9
  10. Upgrade

    Upgrade redhat/microshift-olm-release-info to a version that resolves this vulnerability.

    Fixed in 4.18.54-202608211117.p0.g8eb6c29.assembly.4.18.54.el9
  11. Upgrade

    Upgrade redhat/microshift-release-info to a version that resolves this vulnerability.

    Fixed in 4.18.54-202608211117.p0.g8eb6c29.assembly.4.18.54.el9
  12. Upgrade

    Upgrade redhat/microshift-selinux to a version that resolves this vulnerability.

    Fixed in 4.18.54-202608211117.p0.g8eb6c29.assembly.4.18.54.el9
  13. Upgrade

    Upgrade redhat/microshift to a version that resolves this vulnerability.

    Fixed in 4.18.54-202608211117.p0.g8eb6c29.assembly.4.18.54.el9.aa
  14. Upgrade

    Upgrade redhat/microshift-gateway-api to a version that resolves this vulnerability.

    Fixed in 4.18.54-202608211117.p0.g8eb6c29.assembly.4.18.54.el9.aa
  15. Upgrade

    Upgrade redhat/microshift-multus to a version that resolves this vulnerability.

    Fixed in 4.18.54-202608211117.p0.g8eb6c29.assembly.4.18.54.el9.aa
  16. Upgrade

    Upgrade redhat/microshift-networking to a version that resolves this vulnerability.

    Fixed in 4.18.54-202608211117.p0.g8eb6c29.assembly.4.18.54.el9.aa
  17. Upgrade

    Upgrade redhat/microshift-olm to a version that resolves this vulnerability.

    Fixed in 4.18.54-202608211117.p0.g8eb6c29.assembly.4.18.54.el9.aa
  18. Upgrade

    Upgrade MicroShift to a version that resolves this vulnerability.

    Fixed in 4.18.54
  19. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Patch RHSA-2026:57487

Event History

Aug 26, 2026
Advisory Published
via Red Hat·12:00 AM
Data Sourced
via Red Hat·12:00 AM
RemedyDescriptionAffected Software
Advisory Published
via Red Hat·10:27 AM
Data Sourced
via Red Hat·10:27 AM
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