CVE-2026-2270

Full vulnerability record from the local CVENow database.

Description

A confused deputy attack exists in the StatefulSet controller that allows a user with namespace-scoped write permissions on StatefulSet and ControllerRevision objects to create a cross-namespace pod. An attacker exploiting this vulnerability would have full control over the resulting pod’s metadata and specification, including namespace selection. Note that the cross-namespace pod will be immediately deleted by the garbage collector unless the attacker is able to construct a valid StatefulSet OwnerReference. This would require referencing the UID of an existing StatefulSet in the victim’s namespace.

Severity

MEDIUM

CVSS score

5.9 (v3.1)

Vulnerability status

Awaiting Analysis

Source identifier

[email protected]

Published

2026-10-26 23:17:00.010000

Last modified

2026-10-29 11:17:32.597000

View original CVE JSON

{
  "id": "CVE-2026-2270",
  "sourceIdentifier": "[email protected]",
  "published": "2026-10-26T23:17:00.010",
  "lastModified": "2026-10-29T11:17:32.597",
  "vulnStatus": "Awaiting Analysis",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A confused deputy attack exists in the StatefulSet controller that allows a user with namespace-scoped write permissions on StatefulSet and ControllerRevision objects to create a cross-namespace pod. An attacker exploiting this vulnerability would have full control over the resulting pod’s metadata and specification, including namespace selection. Note that the cross-namespace pod will be immediately deleted by the garbage collector unless the attacker is able to construct a valid StatefulSet OwnerReference. This would require referencing the UID of an existing StatefulSet in the victim’s namespace."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "Kubernetes",
          "product": "Kubernetes",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "v1.34.0",
              "lessThanOrEqual": "v1.34.11",
              "versionType": "custom",
              "status": "affected"
            },
            {
              "version": "v1.35.0",
              "lessThanOrEqual": "v1.35.8",
              "versionType": "custom",
              "status": "affected"
            },
            {
              "version": "v1.36.0",
              "lessThanOrEqual": "v1.36.4",
              "versionType": "custom",
              "status": "affected"
            },
            {
              "version": "v1.37.0",
              "lessThanOrEqual": "v1.37.0",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N",
          "baseScore": 5.9,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "HIGH",
          "privilegesRequired": "HIGH",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 0.7,
        "impactScore": 5.2
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-10-29T03:56:58.054518Z",
          "id": "CVE-2026-2270",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-639"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/kubernetes/kubernetes/issues/142097",
      "source": "[email protected]"
    },
    {
      "url": "https://groups.google.com/g/kubernetes-security-announce/c/wv0iV-Rcmj4",
      "source": "[email protected]"
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2026/09/23/35",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ]
}