FKIE_CVE-2026-45726

Vulnerability from fkie_nvd - Published: 2026-09-17 20:16 - Updated: 2026-09-21 21:17
Severity
7.6 (High) - CVSS:3.1/AV:A/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H
Summary
Omni manages Kubernetes on bare metal, virtual machines, or in a cloud. From 1.3.0 until 1.6.6 and 1.7.3, importing a standalone Talos cluster creates an ImportedClusterSecrets resource containing the cluster's complete CA secrets bundle. The access rules in internal/backend/runtime/omni/state_access.go allow an authenticated user with the Reader role to retrieve the resource through ResourceService if the importing actor has not rotated those secrets, exposing Kubernetes, Talos, and etcd CA private keys plus the service-account key. The Kubernetes CA private key permits certificate signing for privileged identities such as system:masters and provides control of the imported cluster outside Omni's authorization boundary, including its workloads, credentials, and secrets. This issue is fixed in versions 1.6.6 and 1.7.3.
References
security-advisories@github.comhttps://github.com/siderolabs/omni/commit/25fa9e141ee00285e70210ed40d11e4e457c871d
security-advisories@github.comhttps://github.com/siderolabs/omni/commit/a224cb020f3aaca2bc21c3e32a38eb4a37e531e8
security-advisories@github.comhttps://github.com/siderolabs/omni/commit/b8ca100c4539ea83f0ac2e53dcd523e6e5b68111
security-advisories@github.comhttps://github.com/siderolabs/omni/pull/2807
security-advisories@github.comhttps://github.com/siderolabs/omni/releases/tag/v1.6.6
security-advisories@github.comhttps://github.com/siderolabs/omni/releases/tag/v1.7.3
security-advisories@github.comhttps://github.com/siderolabs/omni/security/advisories/GHSA-wv8c-6mx2-xf4j
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "omni",
          "vendor": "siderolabs",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 1.3.0, \u003c 1.6.6"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Omni manages Kubernetes on bare metal, virtual machines, or in a cloud. From 1.3.0 until 1.6.6 and 1.7.3, importing a standalone Talos cluster creates an ImportedClusterSecrets resource containing the cluster\u0027s complete CA secrets bundle. The access rules in internal/backend/runtime/omni/state_access.go allow an authenticated user with the Reader role to retrieve the resource through ResourceService if the importing actor has not rotated those secrets, exposing Kubernetes, Talos, and etcd CA private keys plus the service-account key. The Kubernetes CA private key permits certificate signing for privileged identities such as system:masters and provides control of the imported cluster outside Omni\u0027s authorization boundary, including its workloads, credentials, and secrets. This issue is fixed in versions 1.6.6 and 1.7.3."
    }
  ],
  "id": "CVE-2026-45726",
  "lastModified": "2026-09-21T21:17:03.190",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "ADJACENT_NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.6,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "CHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:A/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 0.9,
        "impactScore": 6.0,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-45726",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-09-21T21:09:02.322777Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-09-17T20:16:49.650",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/siderolabs/omni/commit/25fa9e141ee00285e70210ed40d11e4e457c871d"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/siderolabs/omni/commit/a224cb020f3aaca2bc21c3e32a38eb4a37e531e8"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/siderolabs/omni/commit/b8ca100c4539ea83f0ac2e53dcd523e6e5b68111"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/siderolabs/omni/pull/2807"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/siderolabs/omni/releases/tag/v1.6.6"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/siderolabs/omni/releases/tag/v1.7.3"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/siderolabs/omni/security/advisories/GHSA-wv8c-6mx2-xf4j"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-200"
        },
        {
          "lang": "en",
          "value": "CWE-522"
        },
        {
          "lang": "en",
          "value": "CWE-732"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}



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