Kyverno’s Improper JMESPath Variable Evaluation Leads to Denial of Service_CVE-2025-47281

{
    "lastseen": "",
    "description": "Kyverno is a policy engine designed for cloud native platform engineering teams. In versions 1.14.1 and below, a Denial of Service (DoS) vulnerability exists due to improper handling of JMESPath variable substitutions. Attackers with permissions to create or update Kyverno policies can craft expressions using the {{@}} variable combined with a pipe and an invalid JMESPath function (e.g., {{@ | non_existent_function }}). This leads to a nil value being substituted into the policy structure. Subsequent processing by internal functions, specifically getValueAsStringMap, which expect string values, results in a panic due to a type assertion failure (interface {} is nil, not string). This crashes Kyverno worker threads in the admission controller and causes continuous crashes of the reports controller pod. This is fixed in version 1.14.2.",
    "published": "2025-07-23T20:35:21.199Z",
    "modified": "2025-07-23T20:49:31.882Z",
    "type": "cve",
    "title": "Kyverno's Improper JMESPath Variable Evaluation Leads to Denial of Service",
    "source": "GitHub_M",
    "references": "https://github.com/kyverno/kyverno/security/advisories/GHSA-r5p3-955p-5ggq\nhttps://github.com/kyverno/kyverno/commit/cbd7d4ca24de1c55396fc3295e9fc3215832be7c",
    "id": "CVE-2025-47281",
    "bulletinFamily": "",
    "cwe": [
        "CWE-20",
        "CWE-248"
    ],
    "cvelist": null,
    "sourceData": "kyverno kyverno < 1.14.2",
    "sourceHref": "",
    "cvss": {
        "score": 7.7,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "kyverno",
    "version": "< 1.14.2",
    "vendor": "kyverno",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}