ESB-2026.3493 — Vulnetix

ESB-2026.3493 PUBLISHED CVSS 8.100000381469727 HIGH

=========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2026.3493 OpenShift Container Platform 4.20.18 bug fix and security update 10 April 2026 =========================================================================== AUSCERT Security Bulletin Summary --------------------------------- Product: OpenShift Container Platform 4.20.18 Publisher: Red Hat Operating System: Red Hat Resolution: Patch/Upgrade CVE Names: CVE-2025-58183 CVE-2025-61726 CVE-2025-61728 CVE-2026-33186 CVE-2026-22028 CVE-2026-25679 Original Bulletin: https://access.redhat.com/errata/RHSA-2026:6564 Comment: CVSS (Max): 8.1 CVE-2026-33186 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N) CVSS Source: Red Hat Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N EPSS (Max): 0.1% (18th) CVE-2026-22028 2026-04-09 - --------------------------BEGIN INCLUDED TEXT-------------------- RHSA-2026:6564 - Security Advisory Issued: 2026-04-09 Updated: 2026-04-09 Synopsis Container platform 4.20.18 bug fix and security update Type/Severity Security Advisory: Important Topic Red Hat OpenShift Container Platform release 4.20.18 is now available with updates to packages and images that fix several bugs and add enhancements. This release includes a security update for Red Hat OpenShift Container Platform 4.20. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. Description Red Hat OpenShift Container Platform is Red Hat's cloud computing Kubernetes application platform solution designed for on-premise or private cloud deployments. This advisory contains the container images for Red Hat OpenShift Container Platform 4.20.18. See the following advisory for the RPM packages for this release: https://access.redhat.com/errata/RHBA-2026:6559 Space precludes documenting all of the container images in this advisory. See the following Release Notes documentation, which will be updated shortly for this release, for details about these changes: https://docs.redhat.com/en/documentation/openshift_container_platform/4.20/html /release_notes/ Solution For OpenShift Container Platform 4.20 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.redhat.com/en/documentation/openshift_container_platform/4.20/html /release_notes/ You may download the oc tool and use it to inspect release image metadata for x86_64, s390x, ppc64le, and aarch64 architectures. The image digests may be found at https://quay.io/repository/openshift-release-dev/ocp-release?tab=tags. The sha values for the release are as follows: (For x86_64 architecture) The image digest is sha256:2dab927fd20984e247301b2483083b71f942a1f550f5d8a1db42897edc042e39 (For s390x architecture) The image digest is sha256:49f803e9e47070ebc2aae9ed3433c45c04d967e87175664d061b53d1c0d18b2c (For ppc64le architecture) The image digest is sha256:d3cf84b3adc2adc115da38debf360eaec1d5a7a27edf2b2108e7d58dd7124be8 (For aarch64 architecture) The image digest is sha256:0f7c6277a847229d3ac5ae4f3539cabf7487b0c6030c9e71e321303400439f13 All OpenShift Container Platform 4.20 users are advised to upgrade to these updated packages and images when they are available in the appropriate release channel. To check for available updates, use the OpenShift CLI (oc) or web console. Instructions for upgrading a cluster are available at https:// docs.redhat.com/en/documentation/openshift_container_platform/4.20/html-single/ updating_clusters/index#updating-cluster-cli. Fixes o BZ - 2407258 o BZ - 2427941 o BZ - 2434431 o BZ - 2434432 o BZ - 2445356 o BZ - 2449833 o OCPBUGS-58434 - Console-operator should report plugin services as relatedObjects o OCPBUGS-60912 - `/auth/error?error=missing_state&error_type=auth` is showing empty content o OCPBUGS-76372 - 4.20 CI PTP T-BC & T-TSC Cloud Event Proxy missing ptp-state-change LOCKED after T-BC-STATUS s2 after daemon restart o OCPBUGS-76951 - "Import from Git" should not force HTTPS/443 for Git providers (GitHub/GitLab/Bitbucket) o OCPBUGS-76961 - [release-4.20] Extend the timeout of crictl cmd o OCPBUGS-77896 - node-image-pull.service is failing to fetch release image, resulting installation failure o OCPBUGS-78165 - [openshift-4.20] dpu-intel-ipu-p4sdk can't be built hermetically o OCPBUGS-78200 - CCO reads the wrong record of infrastructure sometimes o OCPBUGS-78424 - Azure machineset: image defaults to wrong resource group o OCPBUGS-78582 - [release-4.20] huge size of log print for endpoint deprecation in prometheus pods in openshift-monitoring o OCPBUGS-78690 - [4.20] Cluster Autoscaler CAPI provider accumulates replica decrements on paused MachineDeployments causing catastrophic scale-down on unpause o OCPBUGS-78741 - GlobalPullSecret e2e test flaky due to race condition with CountAvailableNodes during kubelet restarts o OCPBUGS-78783 - DTK kernel version check fails due to microdnf o OCPBUGS-78839 - create customResourceDefinition sidebar not appearing in the openshift administration console o OCPBUGS-78979 - HostedCluster reconciliation might fail to remove referenced resource annotations o OCPBUGS-79370 - machine-config-server: controller-runtime logger not initialized - "log.SetLogger(...) was never called" warning on startup o OCPBUGS-79419 - 4.20- Custom serviceAccountIssuer unsets service-account-jwks-uri o OCPBUGS-79465 - apiVersion is empty on YAML creation page o OCPBUGS-79466 - Runtime error occurs when create MachineConfig with default yaml from console o OCPBUGS-79577 - [Automated] Update AMI Whitelist o OCPBUGS-79681 - [release-4.20]Catalog operator pod crashed during SNO cluster installation o OCPBUGS-80884 - Adding more tested arm instances to Tested instance types for AWS on 64-bit ARM infrastructures o OCPBUGS-80947 - mco failed at bootimage update with "Error retrieving lease lock" when vcenter dns can not be resolved transitorily o OCPBUGS-80950 - Control Plane Operator fails to reconcile on vanilla Kubernetes on IBMCloud due to missing Route API o OCPBUGS-81146 - 4.20 - Extreme CPU Usage observed from Kubernetes components due to golang-fips TLS1.3 handling o OCPBUGS-81292 - [release-4.20] - add jiazha to approvers o OCPBUGS-81317 - [IBMCloud] MAPI Machine CVEs o CVE-2025-58183 o CVE-2025-61726 o CVE-2025-61728 o CVE-2026-22028 o CVE-2026-25679 o CVE-2026-33186 References o https://access.redhat.com/security/updates/classification/ - --------------------------END INCLUDED TEXT---------------------- You have received this e-mail bulletin as a result of your organisation's registration with AUSCERT. 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Risk Scores

CVSS v3.1

8.100000381469727

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

Affected Products

Vendor	Product	Versions
Red Hat	OpenShift Container Platform 4.20.18

Timeline

Apr 10, 2026 CVE Published
Apr 10, 2026 Distribution Patch

References

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