CVE-2026-66780

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.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/errata/RHSA-2026:63016
https://access.redhat.com/errata/RHSA-2026:67538
https://access.redhat.com/errata/RHSA-2026:67539
https://access.redhat.com/errata/RHSA-2026:67540
https://access.redhat.com/errata/RHSA-2026:67541
https://access.redhat.com/errata/RHSA-2026:67542
https://access.redhat.com/errata/RHSA-2026:67543
https://access.redhat.com/errata/RHSA-2026:72880
https://access.redhat.com/errata/RHSA-2026:85227
https://access.redhat.com/security/cve/CVE-2026-66780
https://bugzilla.redhat.com/show_bug.cgi?id=2507524

Configurations

No configuration.

History

19 Oct 2026, 17:17

Type	Values Removed	Values Added
References		() https://access.redhat.com/errata/RHSA-2026:85227 -

29 Sep 2026, 01:16

Type	Values Removed	Values Added
References		() https://access.redhat.com/errata/RHSA-2026:72880 -

21 Sep 2026, 12:17

Type	Values Removed	Values Added
References		() https://access.redhat.com/errata/RHSA-2026:67538 - () https://access.redhat.com/errata/RHSA-2026:67539 - () https://access.redhat.com/errata/RHSA-2026:67540 - () https://access.redhat.com/errata/RHSA-2026:67541 - () https://access.redhat.com/errata/RHSA-2026:67542 - () https://access.redhat.com/errata/RHSA-2026:67543 -

Information

Published : 2026-08-18 18:19

Updated : 2026-10-19 17:17

NVD link : CVE-2026-66780

Mitre link : CVE-2026-66780

CVE.ORG link : CVE-2026-66780

JSON object : View

Products Affected

No product.

CWE

CWE-532

Insertion of Sensitive Information into Log File

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"https://catalog.redhat.com/software/containers/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:acm:2.15::el9"], "vendor": "Red Hat", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.15", "versions": [{"status": "unaffected", "version": "1789136327", "lessThan": "*", "versionType": "rpm"}], "packageName": "rhacm2/submariner-addon-rhel9", "collectionURL": "https://catalog.redhat.com/software/containers/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:acm:2.16::el9"], "vendor": "Red Hat", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.16", "versions": [{"status": "unaffected", "version": "1789136320", "lessThan": "*", "versionType": "rpm"}], "packageName": "rhacm2/submariner-addon-rhel9", "collectionURL": "https://catalog.redhat.com/software/containers/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:acm:2.16::el9"], "vendor": "Red Hat", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.16", "versions": 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{"cpes": ["cpe:/a:redhat:acm:2.17::el9"], "vendor": "Red Hat", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.17", "versions": [{"status": "unaffected", "version": "1788105072", "lessThan": "*", "versionType": "rpm"}], "packageName": "rhacm2/subctl-rhel9", "collectionURL": "https://catalog.redhat.com/software/containers/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:acm:2.17::el9"], "vendor": "Red Hat", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.17", "versions": [{"status": "unaffected", "version": "1788073481", "lessThan": "*", "versionType": "rpm"}], "packageName": "rhacm2/submariner-rhel9-operator", "collectionURL": "https://catalog.redhat.com/software/containers/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:acm:2.17::el9"], "vendor": "Red Hat", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.17", "versions": [{"status": "unaffected", "version": "1788572527", "lessThan": "*", "versionType": "rpm"}], 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"https://access.redhat.com/errata/RHSA-2026:67542", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:67543", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:72880", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:85227", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/security/cve/CVE-2026-66780", "source": "secalert@redhat.com"}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2507524", "source": "secalert@redhat.com"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Secondary", "source": "secalert@redhat.com", "description": [{"lang": "en", "value": "CWE-532"}]}], "descriptions": [{"lang": "en", "value": "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."}], "lastModified": "2026-10-19T17:17:20.777", "sourceIdentifier": "secalert@redhat.com"}