{
    "CVE_data_meta": {
        "ASSIGNER": "cve@mitre.org",
        "ID": "CVE-2019-15226",
        "STATE": "PUBLIC"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "product": {
                        "product_data": [
                            {
                                "product_name": "n/a",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_value": "n/a"
                                        }
                                    ]
                                }
                            }
                        ]
                    },
                    "vendor_name": "n/a"
                }
            ]
        }
    },
    "data_format": "MITRE",
    "data_type": "CVE",
    "data_version": "4.0",
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "Upon receiving each incoming request header data, Envoy will iterate over existing request headers to verify that the total size of the headers stays below a maximum limit. The implementation in versions 1.10.0 through 1.11.1 for HTTP/1.x traffic and all versions of Envoy for HTTP/2 traffic had O(n^2) performance characteristics. A remote attacker may craft a request that stays below the maximum request header size but consists of many thousands of small headers to consume CPU and result in a denial-of-service attack."
            }
        ]
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "n/a"
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "url": "https://github.com/envoyproxy/envoy/commits/master",
                "refsource": "MISC",
                "name": "https://github.com/envoyproxy/envoy/commits/master"
            },
            {
                "refsource": "MISC",
                "name": "https://github.com/envoyproxy/envoy/commit/afc39bea36fd436e54262f150c009e8d72db5014",
                "url": "https://github.com/envoyproxy/envoy/commit/afc39bea36fd436e54262f150c009e8d72db5014"
            },
            {
                "refsource": "MISC",
                "name": "https://github.com/envoyproxy/envoy/issues/8520",
                "url": "https://github.com/envoyproxy/envoy/issues/8520"
            }
        ]
    }
}