Red Hat Security Advisory: OpenShift Container Platform 4.21.26 bug fix and security update
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 4.21.26. See the following advisory for the RPM packages for this release: https://access.redhat.com/errata/RHBA-2026:44260 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/4.21/html/release_notes/
AI Analysis
Technical Summary
The vulnerability CVE-2026-9277 affects the shell-quote package used in Red Hat OpenShift Service Mesh's Kiali component. It allows arbitrary code execution through command injection caused by unescaped line terminators. This issue is fixed in Kiali 2.4.18 for Red Hat OpenShift Service Mesh 3.0. The advisory includes updated container images for affected products. The CVSS v3.1 base score is 8.1 (high severity), with network attack vector, high attack complexity, no privileges required, no user interaction, and impacts confidentiality, integrity, and availability. The advisory also mentions CVE-2026-32281, a denial of service vulnerability in Go's crypto/x509 package due to inefficient certificate chain validation, but no fix is currently available for that issue. Red Hat continuously monitors trusted certificate authorities to mitigate risk. The affected versions include specific versions of shell-quote and Red Hat OpenShift Service Mesh components as detailed in the advisory.
Potential Impact
Successful exploitation of CVE-2026-9277 can lead to arbitrary code execution on systems running vulnerable versions of Red Hat OpenShift Service Mesh's Kiali component, potentially compromising confidentiality, integrity, and availability. The vulnerability requires no privileges or user interaction but has a high attack complexity. CVE-2026-32281 can cause denial of service by resource exhaustion during certificate validation but requires a specially crafted certificate chain trusted by the system. No known exploits are reported in the wild for these issues.
Mitigation Recommendations
A fix is available for CVE-2026-9277 in Kiali 2.4.18 for Red Hat OpenShift Service Mesh 3.0. Users should upgrade to this version to remediate the command injection vulnerability. For CVE-2026-32281, no fix meeting Red Hat's criteria is currently available; Red Hat recommends monitoring trusted certificate authorities and applying any future updates. Users should follow Red Hat's official advisories and update container images as provided. No additional mitigations are specified by the vendor.
Red Hat Security Advisory: OpenShift Container Platform 4.21.26 bug fix and security update
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 4.21.26. See the following advisory for the RPM packages for this release: https://access.redhat.com/errata/RHBA-2026:44260 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/4.21/html/release_notes/
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability CVE-2026-9277 affects the shell-quote package used in Red Hat OpenShift Service Mesh's Kiali component. It allows arbitrary code execution through command injection caused by unescaped line terminators. This issue is fixed in Kiali 2.4.18 for Red Hat OpenShift Service Mesh 3.0. The advisory includes updated container images for affected products. The CVSS v3.1 base score is 8.1 (high severity), with network attack vector, high attack complexity, no privileges required, no user interaction, and impacts confidentiality, integrity, and availability. The advisory also mentions CVE-2026-32281, a denial of service vulnerability in Go's crypto/x509 package due to inefficient certificate chain validation, but no fix is currently available for that issue. Red Hat continuously monitors trusted certificate authorities to mitigate risk. The affected versions include specific versions of shell-quote and Red Hat OpenShift Service Mesh components as detailed in the advisory.
Potential Impact
Successful exploitation of CVE-2026-9277 can lead to arbitrary code execution on systems running vulnerable versions of Red Hat OpenShift Service Mesh's Kiali component, potentially compromising confidentiality, integrity, and availability. The vulnerability requires no privileges or user interaction but has a high attack complexity. CVE-2026-32281 can cause denial of service by resource exhaustion during certificate validation but requires a specially crafted certificate chain trusted by the system. No known exploits are reported in the wild for these issues.
Mitigation Recommendations
A fix is available for CVE-2026-9277 in Kiali 2.4.18 for Red Hat OpenShift Service Mesh 3.0. Users should upgrade to this version to remediate the command injection vulnerability. For CVE-2026-32281, no fix meeting Red Hat's criteria is currently available; Red Hat recommends monitoring trusted certificate authorities and applying any future updates. Users should follow Red Hat's official advisories and update container images as provided. No additional mitigations are specified by the vendor.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:26080
- Cve Count
- 2
- Additional Cves
- ["CVE-2026-32281"]
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a3088160b89be6888b751f5
Added to database: 06/15/2026, 23:17:42 UTC
Last enriched: 08/17/2026, 21:33:38 UTC
Last updated: 09/14/2026, 18:40:28 UTC
Views: 200
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