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-2026-66781
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.11 — Submariner-operator: pprof debug endpoint enabled by default on 0.0.0.0:8082 without authentication
AV AC PR UI S C I A CVSS EPSS %ile KEV
A L N N U L N L 5.4 .0039 30.2 —
AFFECTED
Product Versions Fixed
Red Hat Advanced Cluster Management for Kubernetes 2.11 unspecified 1787689013
Red Hat Advanced Cluster Management for Kubernetes 2.13 unspecified 1787365971
Red Hat Advanced Cluster Management for Kubernetes 2.14 unspecified 1787362756
Red Hat Advanced Cluster Management for Kubernetes 2.15 unspecified 1787362733
Red Hat Advanced Cluster Management for Kubernetes 2.16 unspecified 1787362694
Red Hat Advanced Cluster Management for Kubernetes 2.17 unspecified 1787362658
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 unspecified —
TIMELINE
Jul 27 Reserved by redhat
Aug 18 Published (CNA: redhat)
Aug 26 PATCH SHIPPED — CVE-2026-66781 (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-2026-66781 (Red Hat Advanced Cluster Management for Kubernetes 2.11). CVSS 6.5 → 5.4 (NVD).
Description
A flaw was found in the Submariner operator. The Submariner Custom Resource (CR), used for configuring network connectivity, stores the IPsec pre-shared key (PSK) in an unencrypted format. This key, which is critical for securing communication between Kubernetes clusters, can be accessed by unauthorized parties. Such access enables an attacker to passively decrypt network traffic flowing between any two clusters in the mesh, resulting in sensitive information disclosure.
Lifecycle
Complete event history — 4 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-2026-66781 (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-2026-66781 (Red Hat Advanced Cluster Management for Kubernetes 2.11). CVSS 6.5 → 5.4 (NVD). |
Affected
Affected products and packages — 9 rows
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| Red Hat | Red Hat Advanced Cluster Management for Kubernetes 2.11 | — | — | 1787689013 |
| Red Hat | Red Hat Advanced Cluster Management for Kubernetes 2.13 | — | — | 1787365971 |
| Red Hat | Red Hat Advanced Cluster Management for Kubernetes 2.14 | — | — | 1787362756 |
| Red Hat | Red Hat Advanced Cluster Management for Kubernetes 2.15 | — | — | 1787362733 |
| Red Hat | Red Hat Advanced Cluster Management for Kubernetes 2.16 | — | — | 1787362694 |
| Red Hat | Red Hat Advanced Cluster Management for Kubernetes 2.17 | — | — | 1787362658 |
| 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 | — | — | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-66781 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.
