{
    "containers": {
        "cna": {
            "affected": [
                {
                    "product": "Kubernetes",
                    "vendor": "Kubernetes",
                    "versions": [
                        {
                            "lessThan": "*",
                            "status": "affected",
                            "version": "0",
                            "versionType": "semver"
                        }
                    ]
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "value": "QiQi Xu"
                }
            ],
            "datePublic": "2021-09-15T00:00:00.000Z",
            "descriptions": [
                {
                    "lang": "en",
                    "value": "A security issue was discovered in Kubernetes where actors that control the responses of MutatingWebhookConfiguration or ValidatingWebhookConfiguration requests are able to redirect kube-apiserver requests to private networks of the apiserver. If that user can view kube-apiserver logs when the log level is set to 10, they can view the redirected responses and headers in the logs."
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "NONE",
                        "baseScore": 4.1,
                        "baseSeverity": "MEDIUM",
                        "confidentialityImpact": "LOW",
                        "integrityImpact": "NONE",
                        "privilegesRequired": "HIGH",
                        "scope": "CHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:N",
                        "version": "3.1"
                    }
                }
            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-441",
                            "description": "CWE-441 Unintended Proxy or Intermediary",
                            "lang": "en",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a6081bf6-c852-4425-ad4f-a67919267565",
                "shortName": "kubernetes",
                "dateUpdated": "2026-06-01T21:45:29.198Z"
            },
            "references": [
                {
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://kubernetes.io/blog/2026/05/26/reconciling-unfixed-kubernetes-cves/"
                },
                {
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://groups.google.com/g/kubernetes-security-announce/c/RV2IhwcrQsY"
                },
                {
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/kubernetes/kubernetes/issues/104720"
                },
                {
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://security.netapp.com/advisory/ntap-20211014-0002/"
                }
            ],
            "source": {
                "defect": [
                    "https://github.com/kubernetes/kubernetes/issues/104720"
                ],
                "discovery": "EXTERNAL"
            },
            "title": "Webhook redirect in kube-apiserver",
            "x_generator": {
                "engine": "Vulnogram 0.0.9"
            }
        },
        "adp": [
            {
                "providerMetadata": {
                    "orgId": "af854a3a-2127-422b-91ae-364da2661108",
                    "shortName": "CVE",
                    "dateUpdated": "2024-08-04T10:03:46.267Z"
                },
                "title": "CVE Program Container",
                "references": [
                    {
                        "tags": [
                            "x_refsource_MISC",
                            "x_transferred"
                        ],
                        "url": "https://groups.google.com/g/kubernetes-security-announce/c/RV2IhwcrQsY"
                    },
                    {
                        "tags": [
                            "x_refsource_MISC",
                            "x_transferred"
                        ],
                        "url": "https://github.com/kubernetes/kubernetes/issues/104720"
                    },
                    {
                        "tags": [
                            "x_refsource_CONFIRM",
                            "x_transferred"
                        ],
                        "url": "https://security.netapp.com/advisory/ntap-20211014-0002/"
                    }
                ]
            }
        ]
    },
    "cveMetadata": {
        "assignerOrgId": "a6081bf6-c852-4425-ad4f-a67919267565",
        "assignerShortName": "kubernetes",
        "cveId": "CVE-2020-8561",
        "datePublished": "2021-09-20T17:05:16.328Z",
        "dateReserved": "2020-02-03T00:00:00.000Z",
        "dateUpdated": "2026-06-01T21:45:29.198Z",
        "state": "PUBLISHED"
    },
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2"
}