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 RPM packages for Red Hat OpenShift Container Platform 4.21.39. See the following advisory for the container images for this release:https://access.redhat.com/errata/RHSA-2026:83702 Security Fix(es): urllib3: urllib3: Denial of Service due to excessive HTTP response decompression (CVE-2026-44432) ansible-core: argument injection in ansible-galaxy role install leads to arbitrary code execution (CVE-2026-11332) golang.org/x/crypto/ssh: golang.org/x/crypto/ssh: Denial of Service via crafted AES-GCM packet decoder inputs (CVE-2026-46597) net/http/internal/http2: golang: golang.org/x/net: Go HTTP/2: Denial of Service via malformed SETTINGSMAXFRAMESIZE frame (CVE-2026-33814) brace-expansion: brace-expansion: Denial of Service via uncontrolled recursion in nested brace patterns (CVE-2026-102278) js-yaml: js-yaml: Denial of Service vulnerability in YAML parsing (CVE-2026-84375) urllib3: urllib3: Information disclosure via cross-origin redirects forwarding sensitive headers (CVE-2026-44431) 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.All OpenShift Container Platform 4.21 users are advised to upgrade to these updated packages and images when they are available in the appropriate release channel. To check for available updates, use the OpenShift CLI (oc) or web console. Instructions for upgrading a cluster are available at https://docs.redhat.com/en/documentation/openshiftcontainerplatform/4.21/html-single/updatingclusters/index#updating-cluster-cli.

A flaw was found in ansible-core. The ansible-galaxy role install command processes dependency specifications from a role's meta/requirements.yml file. Due to improper neutralization of argument delimiters, a malicious role author can inject arbitrary git configuration flags through the src field. This allows arbitrary code execution on the machine of a user who installs the role via ansible-galaxy role install.

A flaw was found in ansible-core's ansible-galaxy command. When installing a role, ansible-galaxy processes a meta/requirements.yml file that lists role dependencies. The src and name fields from this file are passed as arguments to git clone via Python's Popen without a -- separator to delimit options from positional arguments. A malicious role author can craft a dependency entry where the src field contains a git configuration flag (e.g., -ccore.sshCommand=sh -c "maliciouscommand") and the name field provides a valid repository URL. This results in arbitrary code execution on the system of any user who installs the role. The fix is to insert -- before the positional arguments in the git clone command list.

A flaw was found in Ansible. The ansible-core user module can allow an unprivileged user to silently create or replace the contents of any file on any system path and take ownership of it when a privileged user executes the user module against the unprivileged user's home directory. If the unprivileged user has traversal permissions on the directory containing the exploited target file, they retain full control over the contents of the file as its owner.