VDB

CVE-2026-66793

CVE-2026-66793 PUBLISHED CVSS 8.8 HIGH

Reported by redhat · Published August 18, 2026

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.

Risk scores

CVSS 3.1
8.8
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

VendorProductVersions
Red HatRed Hat Advanced Cluster Management for Kubernetes 2.111787683327
Red HatRed Hat Advanced Cluster Management for Kubernetes 2.131787259078
Red HatRed Hat Advanced Cluster Management for Kubernetes 2.141787080755
Red HatRed Hat Advanced Cluster Management for Kubernetes 2.151787238535
Red HatRed Hat Advanced Cluster Management for Kubernetes 2.161787080753
Red HatRed Hat Advanced Cluster Management for Kubernetes 2.171787227696
Red HatRed Hat Advanced Cluster Management for Kubernetes 2.171787227696
Red HatRed Hat Advanced Cluster Management for Kubernetes 2.151787238535
Red HatRed Hat Advanced Cluster Management for Kubernetes 2.161787080753
Red HatRed Hat Advanced Cluster Management for Kubernetes 2.131787259078
Red HatRed Hat Advanced Cluster Management for Kubernetes 2.141787080755
Red HatRed Hat Advanced Cluster Management for Kubernetes 2
Red HatRed Hat Advanced Cluster Management for Kubernetes 2.111787683327

Timeline

  • Aug 18, 2026 Coalition ESS Score
  • Aug 18, 2026 CVE Published
  • Aug 20, 2026 CVE Updated
  • Aug 24, 2026 EPSS Score (30 in total, the first dated here)
  • Sep 6, 2026 Distribution Patch (6 in total, the first dated here)
  • Sep 6, 2026 Security Advisory (6 in total, the first dated here)

Query this with the API

The same record, from the CLI:

vulnetix vdb vuln CVE-2026-66793
vulnetix vdb fixes CVE-2026-66793

Or with curl, using the org id and key from your account page:

curl -s -H "Authorization: ApiKey ${VULNETIX_ORG_ID}:${VULNETIX_API_KEY}" \
  "https://api.vdb.vulnetix.com/v2/vuln/CVE-2026-66793/fixes/registry"

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References

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