Critical9.1Vendor: HighRed Hat Linux

Critical [CVE-2026-33186] Authorization bypass due to improper HTTP/2 path validation

This critical-severity Red Hat Linux advisory covers CVE-2026-33186 affecting Red Hat OpenShift Container Platform 4.16, Red Hat OpenShift Container Platform 4.17, Red Hat OpenShift Container Platform 4.18.

CVE-2026-33186 Published Mar 20, 2026

CVE-2026-33186

Affected products & platforms

Red Hat LinuxUnclassified

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Summary

Authorization bypass due to improper HTTP/2 path validation. Red Hat rates this important (CVSS 9.1).

Weakness: CWE-551. Affected package(s): rhoai/odh-pipeline-runtime-pytorch-cuda-py312-rhel9:1780078429, odf4/odf-csi-addons-sidecar-rhel9:1781550957, rhtas/trillian-logserver-rhel9:1776243434, openshift4/ose-cluster-olm-rhel9-operator:1779787336, rhdh/rhdh-rhel9-operator:1774544220, openshift4/ose-csi-driver-nfs-rhel9:1778242571.

Resolved in Red Hat advisory RHSA-2026:27893 — update the affected packages (`sudo dnf update`).

Affected products named by the advisory: Red Hat OpenShift Container Platform 4.16; Red Hat OpenShift Container Platform 4.17; Red Hat OpenShift Container Platform 4.18; Red Hat Satellite 6.16 for RHEL 8; and 129 more.

Affected versions

rhoai/odh-pipeline-runtime-pytorch-cuda-py312-rhel9:1780078429
odf4/odf-csi-addons-sidecar-rhel9:1781550957
rhtas/trillian-logserver-rhel9:1776243434
openshift4/ose-cluster-olm-rhel9-operator:1779787336
rhdh/rhdh-rhel9-operator:1774544220
openshift4/ose-csi-driver-nfs-rhel9:1778242571
odf4/cephcsi-rhel9-operator:1781549637
multicluster-engine/assisted-installer-rhel9:1776949906
openshift4/openshift-route-controller-manager-rhel9:1780042119
openshift4/ose-sriov-network-webhook-rhel9:1779255322
odf4/odf-cli-rhel9:1781557189
multicluster-globalhub/multicluster-globalhub-grafana-rhel9:1778867753

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Fixed versions

RHSA-2026:27893

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Mitigation checklist

Recommended fix / mitigation

Update the affected package(s) to the fixed version shipped in RHSA-2026:27893 (`sudo dnf update` / `yum update`).

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

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