CVE-2026-42965: Red Hat Openshift Container Platform

Medium severity, CVSS 6.5. EPSS: 0.5% chance of exploitation in the next 30 days.

A flaw was found in the OpenShift Router. A user with EndpointSlice write access can exploit this vulnerability by creating a Service backed by an FQDN (Fully Qualified Domain Name) EndpointSlice that resolves to a cloud metadata endpoint. This allows the router to proxy requests to the cloud metadata endpoint, leading to the disclosure of instance credentials and other sensitive metadata. This bypasses previous security measures for validating IP addresses.

Affected products

• Red Hat Openshift Container Platform: version 4.0 only
• Red Hat Openshift Router: affected versions not specified

Published 2026-05-29. Last modified 2026-10-01.