Detections
Analytics
RHCOS 4 : OpenShift Container Platform 4.21.40 (RHSA-2026:89229)
medium Nessus Plugin ID 373561
Language:
Synopsis
The remote Red Hat CoreOS host is missing a security update for OpenShift Container Platform 4.21.40.Description
The remote Red Hat Enterprise Linux CoreOS 4 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2026:89229 advisory.- crypto/x509: golang: crypto/x509: Man-in-the-middle attacks via untrusted intermediate certificates (CVE-2026-111943)
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 RHCOS OpenShift Container Platform 4.21.40 packages based on the guidance in RHSA-2026:89229.See Also
https://access.redhat.com/errata/RHSA-2026:89229
https://access.redhat.com/security/updates/classification/#important
Plugin Details
Severity: Medium
ID: 373561
File Name: rhcos-RHSA-2026-89229.nasl
Version: 1.1
Type: Local
Agent: unix
Family: Red Hat Local Security Checks
Published: 10/29/2026
Updated: 10/29/2026
Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus
Risk Information
VPR
Risk Factor: High
Score: 7.3
Percentile: 98.16
Vendor
Vendor Severity: Important
CVSS v2
Risk Factor: High
Base Score: 7.1
Temporal Score: 5.3
Vector: CVSS2#AV:N/AC:H/Au:N/C:C/I:C/A:N
CVSS Score Source: CVE-2026-111943
CVSS v3
Risk Factor: Medium
Base Score: 6.8
Temporal Score: 5.9
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
Vulnerability Information
CPE: cpe:/o:redhat:enterprise_linux:10:coreos, cpe:/o:redhat:enterprise_linux:8:coreos, cpe:/o:redhat:enterprise_linux:9:coreos, p-cpe:/a:redhat:enterprise_linux:cri-tools, p-cpe:/a:redhat:enterprise_linux:openshift-clients-redistributable, p-cpe:/a:redhat:enterprise_linux:openshift-clients, p-cpe:/a:redhat:enterprise_linux:openshift-hyperkube, p-cpe:/a:redhat:enterprise_linux:openshift-kube-apiserver, p-cpe:/a:redhat:enterprise_linux:openshift-kube-controller-manager, p-cpe:/a:redhat:enterprise_linux:openshift-kube-scheduler, p-cpe:/a:redhat:enterprise_linux:openshift-kubelet, p-cpe:/a:redhat:enterprise_linux:openshift, p-cpe:/a:redhat:enterprise_linux:ose-aws-ecr-image-credential-provider, p-cpe:/a:redhat:enterprise_linux:ose-azure-acr-image-credential-provider, p-cpe:/a:redhat:enterprise_linux:ose-crio-credential-provider, p-cpe:/a:redhat:enterprise_linux:ose-gcp-gcr-image-credential-provider
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: 10/27/2026
Vulnerability Publication Date: 10/20/2026
Reference Information
CVE: CVE-2026-111943
CWE: 295
RHSA: 2026:89229