Vulnerability-Lookup

CVE-2026-66780 (GCVE-0-2026-66780)

Vulnerability from cvelistv5 – Published: 2026-08-18 17:32 – Updated: 2026-08-18 18:45

Title

Submariner-operator: submariner-operator: flat broker trust model grants every spoke full crud on all endpoints, secrets, and endpointslices in broker namespace

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.

Severity

9.9 (Critical)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-18 18:44 UTC

CWE

CWE-284 - Improper Access Control

Assigner

redhat redhat root

References

2 references

URL	Tags
https://access.redhat.com/security/cve/CVE-2026-66780	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2507524	issue-trackingx_refsource_REDHAT

Impacted products

1 product

Vendor	Product	Version	CPE status
Red Hat	Red Hat Advanced Cluster Management for Kubernetes 2	cpe:/a:redhat:acm:2

Date Public

2026-08-18 16:35

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-66780

Vulnerability from fkie_nvd - Published: 2026-08-18 18:19 - Updated: 2026-08-18 19:17

Severity

9.9 (Critical) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Summary

References

	URL	Tags
	secalert@redhat.com	https://access.redhat.com/security/cve/CVE-2026-66780
	secalert@redhat.com	https://bugzilla.redhat.com/show_bug.cgi?id=2507524

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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GHSA-3XMH-PHWC-5F4G

Vulnerability from github – Published: 2026-08-18 18:32 – Updated: 2026-08-18 18:32

Details

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.

Severity

9.9 (Critical)


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

Show details on source website

JSON

To clipboard

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    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-18T18:19:23Z",
    "severity": "CRITICAL"
  },
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  "id": "GHSA-3xmh-phwc-5f4g",
  "modified": "2026-08-18T18:32:02Z",
  "published": "2026-08-18T18:32:02Z",
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      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-66780"
    },
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      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

CVE-2026-66780 (GCVE-0-2026-66780)

FKIE_CVE-2026-66780

GHSA-3XMH-PHWC-5F4G

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