RHSA-2026:49687 - Security Advisory

Topic

Kiali 2.4.21 for Red Hat OpenShift Service Mesh 3.0 is now available.
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

Kiali 2.4.21, for Red Hat OpenShift Service Mesh 3.0, provides observability for the service mesh by offering a visual representation of the mesh topology and metrics, helping users monitor, trace, and manage efficiently.

Security Fix(es):

• CVE-2026-59873 openshift-service-mesh/kiali-ossmc-rhel9: node-tar: Denial of Service via crafted gzip bomb (OSSM-14901)
• CVE-2026-59873 openshift-service-mesh/kiali-rhel9: node-tar: Denial of Service via crafted gzip bomb (OSSM-14903)
• CVE-2026-59874 openshift-service-mesh/kiali-rhel9: Node-tar: Denial of Service via malformed tar archive header (OSSM-14915)
• CVE-2026-59874 openshift-service-mesh/kiali-ossmc-rhel9: Node-tar: Denial of Service via malformed tar archive header (OSSM-14916)
• CVE-2026-59869 openshift-service-mesh/kiali-rhel9: js-yaml: Denial of Service via crafted YAML documents (OSSM-14922)
• CVE-2026-59869 openshift-service-mesh/kiali-ossmc-rhel9: js-yaml: Denial of Service via crafted YAML documents (OSSM-14927)

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.

Solution

See Kiali 2.4.21 documentation at https://docs.redhat.com/en/documentation/red_hat_openshift_service_mesh/3.0/html/observability/kiali-operator-provided-by-red-hat

Affected Products

• Red Hat OpenShift Service Mesh

Fixes

CVEs

• CVE-2026-59869
• CVE-2026-59873
• CVE-2026-59874

References

• https://access.redhat.com/security/updates/classification
• https://access.redhat.com/security/updates/classification/