RHSA-2026:83702 — Red Hat Security Advisory: OpenShift Container Platform 4.21.39 bug fix and security update

The advisory describes bug fixes and security updates for OpenShift Container Platform 4.21.39. It covers HTML-processing risks involving XSS and potentially arbitrary code execution, denial-of-service risks in HTTP/2 and JWE handling, a service disruption caused by the SSH AES-GCM decoder, and an SSRF vulnerability in the OpenShift console exploitable by an authenticated user.