Red Hat Security Advisory

RHSA-2026:21709

OpenShift Container Platform 4.21.18 bug fix and security update

Released 2026-06-02 · Red Hat rating Important · View on Red Hat →

Fixed in

Red Hat OpenShift Container Platform 4.21 registry.redhat.io/openshift4/azure-kms-encryption-provider-rhel9, registry.redhat.io/openshift4/openshift-route-controller-manager-rhel9, registry.redhat.io/openshift4/ose-cli-rhel9 +6

Fixes 3 records

TI-2026-25614 CVE-2026-33186 · GHSA-p77j-4mvh-x3m3

gRPC-Go has an authorization bypass via missing leading slash in :path

MEDIUM 49

gRPC-Go is the Go language implementation of gRPC.

CVSS 3.1CRITICAL 9.1 Network No auth No interaction EPSS 0.01619 Published 2026-03-20 Partial fix · 1.79.3 CWE-285

TI-2026-21474 CVE-2026-26996 · GHSA-3ppc-4f35-3m26

minimatch has a ReDoS via repeated wildcards with non-matching literal in pattern

MEDIUM 44

minimatch is a minimal matching utility for converting glob expressions into JavaScript RegExp objects.

CVSS 4.0HIGH 8.7 Network No auth No interaction EPSS 0.00577 Published 2026-02-20 Partial fix · 10.2.1, 9.0.6 +6 CWE-1333

TI-2026-27208 CVE-2026-34986 · GHSA-78h2-9frx-2jm8

Go JOSE affect by a panic in JWE decryption

MEDIUM 40

Go JOSE provides an implementation of the Javascript Object Signing and Encryption set of standards in Go, including support for JSON Web Encryption (JWE), JSON Web Signature (JWS), and JSON Web Token (JWT) standards.

CVSS 3.1HIGH 7.5 Network No auth No interaction EPSS 0.00663 Published 2026-04-06 Partial fix · 4.1.4, 3.0.5 CWE-248