CVE-2026-66792
Critical
Description
A flaw was found in the multicloud-operators-subscription component. This vulnerability allows a user on a managed cluster to escalate their privileges by creating a Subscription with specific, crafted annotations. Successful exploitation grants the attacker the ability to deploy resources into any namespace with the elevated permissions of the controller's Service Account, potentially leading to unauthorized access and control over cluster resources.
SeverityCritical
CVSS9.9
Exploit probability—
Product
Multicluster Globalhub 1.4
PublishedAug 17, 2026
First seenAug 17, 2026
Weakness typeCWE-863Incorrect authorization
How to fix
Vendor advisories
- access.redhat.com/errata/RHSA-2026:60386
- access.redhat.com/errata/RHSA-2026:60387
- access.redhat.com/errata/RHSA-2026:60388
- access.redhat.com/errata/RHSA-2026:60389
- access.redhat.com/errata/RHSA-2026:60390
- access.redhat.com/errata/RHSA-2026:60391
- access.redhat.com/errata/RHSA-2026:67516
- access.redhat.com/errata/RHSA-2026:71597
- access.redhat.com/errata/RHSA-2026:73419
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| multicluster_globalhub 1.4 | No range specified | — |
| multicluster_globalhub 1.5 | No range specified | — |
| multicluster_globalhub 1.6 | No range specified | — |
| acm 2.11 | No range specified | — |
| acm 2.13 | No range specified | — |
| acm 2.14 | No range specified | — |
| acm 2.15 | No range specified | — |
| acm 2.16 | No range specified | — |
| acm 2.17 | No range specified | — |
| Red Hat Red Hat OpenShift Container Platform 4 | No range specified | — |
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