GHSA-3XMH-PHWC-5F4G

Vulnerability from github – Published: 2026-08-18 18:32 – Updated: 2026-09-29 03:30
VLAI
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
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{
  "affected": [],
  "aliases": [
    "CVE-2026-66780"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-284",
      "CWE-532"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-18T18:19:23Z",
    "severity": "CRITICAL"
  },
  "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\u0027 endpoint information. Consequently, an attacker can redirect inter-cluster tunnel traffic, enabling a Man-in-the-Middle (MITM) attack across the entire cluster mesh.",
  "id": "GHSA-3xmh-phwc-5f4g",
  "modified": "2026-09-29T03:30:37Z",
  "published": "2026-08-18T18:32:02Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-66780"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2507524"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2026-66780"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:72880"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:67543"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:67542"
    },
    {
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    },
    {
      "type": "WEB",
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    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:67539"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:67538"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:63016"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:60391"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:60390"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:60389"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:60388"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:60387"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:60386"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}



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