Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-66793

CVE-2026-66793HIGH

Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.11 — Governance-policy-addon-controller: governance-policy-addon-controller: arbitrary container image override via managedclusteraddon annotation enables rce on spoke

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   L   N  U  H  H  H    8.8   .0081   55.4     —

AFFECTED
  Product                                                  Versions     Fixed
  Red Hat Advanced Cluster Management for Kubernetes 2.11  unspecified  1787683327
  Red Hat Advanced Cluster Management for Kubernetes 2.13  unspecified  1787259078
  Red Hat Advanced Cluster Management for Kubernetes 2.14  unspecified  1787080755
  Red Hat Advanced Cluster Management for Kubernetes 2.15  unspecified  1787238535
  Red Hat Advanced Cluster Management for Kubernetes 2.16  unspecified  1787080753
  Red Hat Advanced Cluster Management for Kubernetes 2.17  unspecified  1787227696

TIMELINE
  Jul 27  Reserved by redhat
  Aug 18  Published (CNA: redhat)
  Aug 26  PATCH SHIPPED — CVE-2026-66793 (Red Hat Advanced Cluster Management for Kubernetes 2.11). Fixed in Red Hat Advanced Cluster Management for Kubernetes 2.11 1787683327.

CWE-20 · CNA: redhat · CVSS v3.1 · 8 references · NVD status: Awaiting Analysis

Description

A flaw was found in the governance-policy-addon-controller component of Red Hat Advanced Cluster Management for Kubernetes. A user with permissions to annotate the namespaced ManagedClusterAddOn resource can override the governance-policy container image. This allows an attacker to run a controlled image with cluster-admin privileges on the managed cluster, leading to arbitrary code execution and privilege escalation.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
July 27, 2026	Reserved	Reserved by redhat
August 18, 2026	Published	Published (CNA: redhat)
August 26, 2026	PATCH SHIPPED	PATCH SHIPPED — CVE-2026-66793 (Red Hat Advanced Cluster Management for Kubernetes 2.11). Fixed in Red Hat Advanced Cluster Management for Kubernetes 2.11 1787683327.

Affected

Affected products and packages — 6 rows
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Red Hat	Red Hat Advanced Cluster Management for Kubernetes 2.11	—	—	1787683327
Red Hat	Red Hat Advanced Cluster Management for Kubernetes 2.13	—	—	1787259078
Red Hat	Red Hat Advanced Cluster Management for Kubernetes 2.14	—	—	1787080755
Red Hat	Red Hat Advanced Cluster Management for Kubernetes 2.15	—	—	1787238535
Red Hat	Red Hat Advanced Cluster Management for Kubernetes 2.16	—	—	1787080753
Red Hat	Red Hat Advanced Cluster Management for Kubernetes 2.17	—	—	1787227696

Weaknesses

CWE-20

References (8)

https://access.redhat.com/errata/RHSA-2026:60386 [vendor-advisory, x_refsource_REDHAT]
https://access.redhat.com/errata/RHSA-2026:60387 [vendor-advisory, x_refsource_REDHAT]
https://access.redhat.com/errata/RHSA-2026:60388 [vendor-advisory, x_refsource_REDHAT]
https://access.redhat.com/errata/RHSA-2026:60389 [vendor-advisory, x_refsource_REDHAT]
https://access.redhat.com/errata/RHSA-2026:60390 [vendor-advisory, x_refsource_REDHAT]
https://access.redhat.com/errata/RHSA-2026:60391 [vendor-advisory, x_refsource_REDHAT]
https://access.redhat.com/security/cve/CVE-2026-66793 [vdb-entry, x_refsource_REDHAT]
https://bugzilla.redhat.com/show_bug.cgi?id=2507538 [issue-tracking, x_refsource_REDHAT]

Authoritative record: CVE-2026-66793 at cve.org

Vendors: red hat

Weaknesses: CWE-20

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-66793 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.