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CRITICAL

CVE-2026-66792

CVSS v3

9.9

CRITICAL

EPSS Score

0.7 %

exploit probability, as of 2026-10-19

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

  • CVE-2026-66792 Red Hat Product Security84 products fixed · 2 known affected

    multicloud-operators-subscription: multicloud-operators-subscription: IsClusterAdmin() trusts user-settable annotations on managed clusters

    openshift4/cnf-tests-rhel8 as a component of Red Hat OpenShift Container Platform 4 · openshift4/ztp-site-generate-rhel8 as a component of Red Hat OpenShift Container Platform 4

  • RHSA-2026:73419 Red Hat Product Security12 products fixed

    Red Hat Security Advisory: Multicluster Global Hub 1.6.6 security update

  • RHSA-2026:71597 Red Hat Product Security12 products fixed

    Red Hat Security Advisory: Multicluster Global Hub 1.5.8 security update

  • RHSA-2026:67516 Red Hat Product Security12 products fixed

    Red Hat Security Advisory: Multicluster Global Hub 1.4.9 security update

  • RHSA-2026:60391 Red Hat Product Security8 products fixed

    Red Hat Security Advisory: Red Hat Advanced Cluster Management for Kubernetes v2.16.4 security update

  • RHSA-2026:60390 Red Hat Product Security8 products fixed

    Red Hat Security Advisory: Red Hat Advanced Cluster Management for Kubernetes v2.13.11 security update

4 more advisories

Full record on NVD

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.

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Published
2026-08-17
Last Modified
2026-08-19

Frequently asked questions

What is CVE-2026-66792?

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.

Is CVE-2026-66792 actively exploited?

Active exploitation of CVE-2026-66792 has not been confirmed. Its EPSS score was 0.7% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-66792?

CVE-2026-66792 has a CVSS v3 base score of 9.9 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

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