Red Hat Security Advisory

RHSA-2026:83503

OpenShift Container Platform 4.20.43 security and extras update

Released 2026-10-20 · Red Hat rating Important · View on Red Hat →

Fixed in

Red Hat OpenShift Container Platform 4.20 registry.redhat.io/openshift4/nmstate-console-plugin-rhel9, registry.redhat.io/openshift4/ose-cluster-capacity-rhel9, registry.redhat.io/openshift4/ose-local-storage-diskmaker-rhel9 +5

Fixes 4 records

TI-2026-42693 CVE-2026-59879 · GHSA-v56q-mh7h-f735

Immutable.js `List` 32-bit trie overflow → unrecoverable DoS

HIGH 77

Immutable.js provides many Persistent Immutable data structures.

CVSS 4.0HIGH 8.7 Network No auth No interaction EPSS 0.00575 Published 2026-07-08 Partial fix · 5.1.8, 4.3.9 +1 CWE-1284

TI-2026-57986 CVE-2026-84375 · GHSA-2883-xcg3-v3hh

js-yaml: maxTotalMergeKeys does not limit CPU use for empty merge sources

MEDIUM 40

js-yaml is a JavaScript YAML parser and dumper.

CVSS 3.1HIGH 7.5 Network No auth No interaction EPSS 0.00541 Published 2026-09-01 Partial fix · 3.15.2, 4.3.2 +1 CWE-400

TI-2026-26186 CVE-2026-33814

Infinite loop in HTTP/2 transport when given bad SETTINGS_MAX_FRAME_SIZE in net/http/internal/http2 in golang.org/x/net

MEDIUM 40

When processing HTTP/2 SETTINGS frames, transport will enter an infinite loop of writing CONTINUATION frames if it receives a SETTINGS_MAX_FRAME_SIZE with a value of 0.

CVSS 3.1HIGH 7.5 Network No auth No interaction EPSS 0.0084 Published 2026-05-07 Partial fix · 0.53.0, 1.25.10 +1 CWE-835

TI-2026-34256 CVE-2026-46597 · GHSA-q4h4-gmj2-qvw2

Invoking byte arithmetic causes underflow and panic in golang.org/x/crypto/ssh

LOW 39

An incorrectly placed cast from bytes to int allowed for server-side panic in the AES-GCM packet decoder for well-crafted inputs.

CVSS 3.1HIGH 7.5 Network No auth No interaction EPSS 0.00473 Published 2026-05-22 Partial fix · 0.52.0 CWE-704