High7.5Red Hat Linux

High [CVE-2026-33487] Integrity bypass due to incorrect XML Digital Signature validation via loop variable capture issue

This high-severity Red Hat Linux advisory covers CVE-2026-33487 affecting Red Hat Advanced Cluster Management for Kubernetes 2.14, Red Hat Advanced Cluster Management for Kubernetes 2.15, Red Hat OpenShift GitOps 1.18.

CVE-2026-33487 Published Mar 26, 2026

CVE-2026-33487

Affected products & platforms

Red Hat LinuxUnclassified

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Summary

Integrity bypass due to incorrect XML Digital Signature validation via loop variable capture issue. Red Hat rates this important (CVSS 7.5).

Weakness: CWE-347.

Affected package(s): multicluster-globalhub/multicluster-globalhub-grafana-rhel9:1779212259, multicluster-globalhub/multicluster-globalhub-grafana-rhel9:1780167118, rhacm2/acm-grafana-rhel9:1777142269, multicluster-globalhub/multicluster-globalhub-grafana-rhel9:1778867753, multicluster-globalhub/multicluster-globalhub-grafana-rhel9:1779579439, openshift-gitops.

Resolved in Red Hat advisory RHSA-2026:21769 — update the affected packages (`sudo dnf update`).

Affected products named by the advisory: Red Hat Advanced Cluster Management for Kubernetes 2.14; Red Hat Advanced Cluster Management for Kubernetes 2.15; Red Hat OpenShift GitOps 1.18; Red Hat OpenShift GitOps 1.19; and 6 more.

Affected versions

multicluster-globalhub/multicluster-globalhub-grafana-rhel9:1779212259
multicluster-globalhub/multicluster-globalhub-grafana-rhel9:1780167118
rhacm2/acm-grafana-rhel9:1777142269
multicluster-globalhub/multicluster-globalhub-grafana-rhel9:1778867753
multicluster-globalhub/multicluster-globalhub-grafana-rhel9:1779579439
openshift-gitops-1/dex-rhel8:1779209965
openshift-gitops-1/dex-rhel8:1779116359

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

Fixed versions

RHSA-2026:21769

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-2026:21769 (`sudo dnf update` / `yum update`).

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

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