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-2026-66780
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.11 — Submariner-operator: broker serviceaccount secret (token + ca) logged in full at trace verbosity
AV AC PR UI S C I A CVSS EPSS %ile KEV
N L L N U H N N 6.5 .0058 45.7 —
AFFECTED
Product Versions Fixed
Red Hat Advanced Cluster Management for Kubernetes 2.11 unspecified 1789135606
Red Hat Advanced Cluster Management for Kubernetes 2.13 unspecified 1789131397
Red Hat Advanced Cluster Management for Kubernetes 2.14 unspecified 1789136328
Red Hat Advanced Cluster Management for Kubernetes 2.15 unspecified 1789136327
Red Hat Advanced Cluster Management for Kubernetes 2.16 unspecified 1789136320
Red Hat Advanced Cluster Management for Kubernetes 2.16 unspecified 1787854416
Red Hat Advanced Cluster Management for Kubernetes 2.17 unspecified 1788105072
Red Hat Advanced Cluster Management for Kubernetes 2.17 unspecified 1788073481
Red Hat Advanced Cluster Management for Kubernetes 2.17 unspecified 1788572527
Red Hat Advanced Cluster Management for Kubernetes 2 unspecified —
TIMELINE
Jul 27 Reserved by redhat
Aug 18 Published (CNA: redhat)
Aug 26 PATCH SHIPPED — CVE-2026-66780 (Red Hat Advanced Cluster Management for Kubernetes 2.11). Fixed in Red Hat Advanced Cluster Management for Kubernetes 2.11 1787689013.
Sep 1 RESCORED — CVE-2026-66780 (Red Hat Advanced Cluster Management for Kubernetes 2). CVSS 9.9 → 6.5 (NVD).
Sep 2 PATCH SHIPPED — CVE-2026-66780 (Red Hat Advanced Cluster Management for Kubernetes 2.17). Fixed in Red Hat Advanced Cluster Management for Kubernetes 2.17 1788105072.
Description
A flaw was found in the submariner-operator component. The `submariner-k8s-broker-cluster` Role, which is assigned to joined clusters, possesses excessive permissions. This allows a compromised cluster to alter network configurations, specifically by overwriting other clusters' endpoint information. Consequently, an attacker can redirect inter-cluster tunnel traffic, enabling a Man-in-the-Middle (MITM) attack across the entire cluster mesh.
Lifecycle
Complete event history — 5 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-2026-66780 (Red Hat Advanced Cluster Management for Kubernetes 2.11). Fixed in Red Hat Advanced Cluster Management for Kubernetes 2.11 1787689013. |
| September 1, 2026 | RESCORED | RESCORED — CVE-2026-66780 (Red Hat Advanced Cluster Management for Kubernetes 2). CVSS 9.9 → 6.5 (NVD). |
| September 2, 2026 | PATCH SHIPPED | PATCH SHIPPED — CVE-2026-66780 (Red Hat Advanced Cluster Management for Kubernetes 2.17). Fixed in Red Hat Advanced Cluster Management for Kubernetes 2.17 1788105072. |
Affected
Affected products and packages — 10 rows
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| Red Hat | Red Hat Advanced Cluster Management for Kubernetes 2.11 | — | — | 1789135606 |
| Red Hat | Red Hat Advanced Cluster Management for Kubernetes 2.13 | — | — | 1789131397 |
| Red Hat | Red Hat Advanced Cluster Management for Kubernetes 2.14 | — | — | 1789136328 |
| Red Hat | Red Hat Advanced Cluster Management for Kubernetes 2.15 | — | — | 1789136327 |
| Red Hat | Red Hat Advanced Cluster Management for Kubernetes 2.16 | — | — | 1789136320 |
| Red Hat | Red Hat Advanced Cluster Management for Kubernetes 2.16 | — | — | 1787854416 |
| Red Hat | Red Hat Advanced Cluster Management for Kubernetes 2.17 | — | — | 1788105072 |
| Red Hat | Red Hat Advanced Cluster Management for Kubernetes 2.17 | — | — | 1788073481 |
| Red Hat | Red Hat Advanced Cluster Management for Kubernetes 2.17 | — | — | 1788572527 |
| Red Hat | Red Hat Advanced Cluster Management for Kubernetes 2 | — | — | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-66780 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.
