Kubernetes C# Client: improper certificate validation in custom CA mode may lead to man-in-the-middle attacks_CVE-2025-9708

{
    "lastseen": "",
    "description": "A vulnerability exists in the Kubernetes C# client where the certificate validation logic accepts properly constructed certificates from any Certificate Authority (CA) without properly verifying the trust chain. This flaw allows a malicious actor to present a forged certificate and potentially intercept or manipulate communication with the Kubernetes API server, leading to possible man-in-the-middle attacks and API impersonation.",
    "published": "2025-09-16T21:08:05.189Z",
    "modified": "2025-09-16T21:08:05.189Z",
    "type": "cve",
    "title": "Kubernetes C# Client: improper certificate validation in custom CA mode may lead to man-in-the-middle attacks",
    "source": "kubernetes",
    "references": "https://groups.google.com/g/kubernetes-security-announce/c/rLopt2Msvbw/m/rK6XeNw2CgAJ\nhttps://github.com/kubernetes/kubernetes/issues/134063",
    "id": "CVE-2025-9708",
    "bulletinFamily": "",
    "cwe": [
        "CWE-295"
    ],
    "cvelist": null,
    "sourceData": "Kubernetes Kubernetes CSharp Client 0",
    "sourceHref": "",
    "cvss": {
        "score": 6.8,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
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            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Kubernetes CSharp Client",
    "version": "0",
    "vendor": "Kubernetes",
    "ai_description": "",
    "ai_severity": "",
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    "ai_score": 0
}