Advisory severityMedium6.5Vendor: HighRed Hat Linux

Medium [CVE-2026-66780] Broker ServiceAccount Secret (token + CA) logged in full at TRACE verbosity

This medium-severity Red Hat Linux advisory covers CVE-2026-66780 affecting Red Hat Advanced Cluster Management for Kubernetes 2.17.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-66780 Source published Aug 18, 2026Source updated Aug 18, 2026

VulniPulse record published Aug 19, 2026Record updated Sep 3, 2026

CVE-2026-66780

Affected products & platforms

Red Hat LinuxUnclassified

Open source advisory

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Summary

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.

Red Hat severity: Important — CVSS 6.5 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N). Weakness: CWE-532.

Affected Red Hat products: Red Hat Advanced Cluster Management for Kubernetes 2.17; Red Hat Advanced Cluster Management for Kubernetes 2. Red Hat fixing advisory: RHSA-2026:63016.

Affected versions

No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.

Official advisory · high-confidence parse· fetched 23 days ago·verify at source

Fixed versions

rhacm2/subctl-rhel9:1788105072
rhacm2/submariner-rhel9-operator:1788073481
RHSA-2026:63016

Official advisory · high-confidence parse· fetched 23 days ago·verify at source

Mitigation checklist

Recommended fix / mitigation

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

Official advisory · high-confidence parse· fetched 23 days ago·verify at source

Sources

Official and corroborating records used to build this advisory.

Red Hat Security Data APIofficial
Official vendor source used to discover this advisory; it remains the authority for affected products and remediation. Discovered from the machine-readable feed https://access.redhat.com/hydra/rest/securitydata/cve.json; this link opens the Red Hat Linux advisory index instead of the raw feed document.
Red Hat Linux
Official vendor advisoryofficial
Official advisory page fetched and parsed; accepted detail fields are attributed to this page.
Red Hat Linux
CVE.org CNA affected-product recordCVE.org
Structured CNA affected[] data independently confirmed the affected product scope; native advisory content remains authoritative.
CVE Program

Cross-references

Validate CVE metadata against the authoritative registries.

CVE-2026-66780NVD CVE.org MITRE

Discussion(0)

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