Red Hat Security AdvisoryRHSA-2026:71450
OpenShift Container Platform 4.20.40 bug fix and security update
Released 2026-09-29 · Red Hat rating Important · View on Red Hat →
Fixed in
- Red Hat OpenShift Container Platform 4.20 registry.redhat.io/openshift4/aws-karpenter-provider-aws-rhel9, registry.redhat.io/openshift4/aws-kms-encryption-provider-rhel9, registry.redhat.io/openshift4/azure-kms-encryption-provider-rhel9 +47
Fixes 12 records
Priority HIGH 67
### Summary `qs.stringify` throws a `TypeError` when it serializes an object whose own `constructor` property has a truthy, non-callable `isBuffer` member.
CVSS 4.0MEDIUM 6.3· Network · No auth · No interaction · EPSS 0.00396 · Published 2026-08-29 · Partial fix · 6.16.0 CWE-248
Priority MEDIUM 48
When adding a key to a remote agent constraint extensions such as [email protected] were not serialized in the request.
CVSS 3.1CRITICAL 9.1· Network · No auth · No interaction · EPSS 0.00683 · Published 2026-05-22 · Partial fix · 0.52.0 CWE-502
Priority MEDIUM 48
The Verify() method for FIDO/U2F security key types ([email protected], [email protected]) did not check the User Presence flag.
CVSS 3.1CRITICAL 9.1· Network · No auth · No interaction · EPSS 0.00478 · Published 2026-05-22 · Partial fix · 0.52.0 CWE-862
Priority MEDIUM 47
A flaw was found in the OpenShift console.
CVSS 3.1CRITICAL 9.3· Network · No auth · No interaction · EPSS 0.00733 · Published 2026-09-18 · Fixed in 1790102793, 1791299243 +9 CWE-918
Priority MEDIUM 46
A malicious SSH peer could send unsolicited global request responses to fill an internal buffer, blocking the connection's read loop.
CVSS 3.1CRITICAL 9.1· Network · No auth · No interaction · EPSS 0.00683 · Published 2026-05-22 · Partial fix · 0.52.0 CWE-119
Priority MEDIUM 40
Decoding a maliciously-crafted MIME header containing many invalid encoded-words can consume excessive CPU.
CVSS 3.1HIGH 7.5· Network · No auth · No interaction · EPSS 0.0056 · Published 2026-06-02 · Partial fix · 1.25.11, 1.26.4 CWE-407
Priority 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
Priority LOW 39
A flaw was found in the OpenShift console.
CVSS 3.1HIGH 7.5· Network · No auth · No interaction · EPSS 0.00529 · Published 2026-09-23 · Fixed in 1790102793, 1791299243 +9 CWE-22
Priority 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
Priority LOW 39
The RSA and DSA public key parsers did not enforce size limits on key parameters.
CVSS 3.1HIGH 7.5· Network · No auth · No interaction · EPSS 0.00467 · Published 2026-05-22 · Partial fix · 0.52.0 CWE-347
Priority LOW 38
A flaw was found in openshift/console.
CVSS 3.1HIGH 7.2· Network · No auth · No interaction · EPSS 0.00331 · Published 2026-09-23 · Fixed in 1789939565, 1789904865 +4 CWE-441
Priority LOW 27
Parsing arbitrary HTML which is then rendered using Render can result in an unexpected HTML tree.
CVSS 3.1MEDIUM 6.1· Network · No auth · User interaction · EPSS 0.00223 · Published 2026-05-22 · Partial fix · 0.55.0 CWE-1021