CVE-2026-10090 A flaw was found in the Application Subscription controller (multicluster-operators-subscription) of Red Hat Advanced…
Description
A flaw was found in the Application Subscription controller (multicluster-operators-subscription) of Red Hat Advanced Cluster Management for Kubernetes (ACM). A user with namespace-scoped "edit" privileges in an ACM hub namespace can create a Channel resource pointing to a Helm repository they control and a Subscription resource referencing it. The app-subscription controller fetches and applies the Helm chart contents with its own elevated authority, without verifying whether the subscription creator holds the "open-cluster-management:subscription-admin" role and without restricting applied resources to the subscription namespace. This allows the attacker to include cluster-scoped resources in the Helm chart, such as a ClusterRoleBinding granting the attacker's ServiceAccount the "cluster-admin" ClusterRole. Successful exploitation results in full cluster-admin privilege escalation. This contradicts the ACM documentation which states that non-subscription-admin users should have resources deployed into the subscription namespace only.
Produits et versions touchés
| Produit | Versions touchées | Corrigé en |
|---|---|---|
| Red Hat Advanced Cluster Management for Kubernetes 2 | Versions non publiées | |
| Red Hat Advanced Cluster Management for Kubernetes 2.11 1787263584 | premières → < 1787263584 | 1787263584 |
| Red Hat Advanced Cluster Management for Kubernetes 2.13 1787263693 | premières → < 1787263693 | 1787263693 |
| Red Hat Advanced Cluster Management for Kubernetes 2.14 1787170830 | premières → < 1787170830 | 1787170830 |
| Red Hat Advanced Cluster Management for Kubernetes 2.15 1787240030 | premières → < 1787240030 | 1787240030 |
| Red Hat Advanced Cluster Management for Kubernetes 2.16 1787242321 | premières → < 1787242321 | 1787242321 |
| Red Hat Advanced Cluster Management for Kubernetes 2.17 1787242108 | premières → < 1787242108 | 1787242108 |
| Red Hat Advanced Cluster Management for Kubernetes 2.14.0 1787170830 | premières → < 1787170830 | 1787170830 |
Références
- RHSA-2026:60386 access.redhat.com
- RHSA-2026:60387 access.redhat.com
- RHSA-2026:60388 access.redhat.com
- RHSA-2026:60389 access.redhat.com
- RHSA-2026:60390 access.redhat.com
- RHSA-2026:60391 access.redhat.com
- access.redhat.com access.redhat.com
- RHBZ#2483292 bugzilla.redhat.com
Chronologie
- Publiée
- Dernière modification