{
    "id": "CVE-2019-20445",
    "published": "2020-01-29 21:15:11",
    "last_modified": "2026-06-17 02:30:27",
    "cvss_score": "9.1",
    "cvss_severity": "CRITICAL",
    "cvss_version": "3.1",
    "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
    "cwe": "CWE-444",
    "description": "HttpObjectDecoder.java in Netty before 4.1.44 allows a Content-Length header to be accompanied by a second Content-Length header, or by a Transfer-Encoding header.",
    "epss_score": "0.13474",
    "epss_percentile": "0.96335",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 0,
    "updated_at": "2026-10-03 18:17:23",
    "priority": {
        "rank": 2,
        "label": "Patch early",
        "why": "EPSS 13.5% — above the 10% action threshold."
    },
    "products": [
        {
            "vendor": "apache",
            "product": "spark"
        },
        {
            "vendor": "canonical",
            "product": "ubuntu_linux"
        },
        {
            "vendor": "debian",
            "product": "debian_linux"
        },
        {
            "vendor": "fedoraproject",
            "product": "fedora"
        },
        {
            "vendor": "netty",
            "product": "netty"
        },
        {
            "vendor": "redhat",
            "product": "enterprise_linux"
        },
        {
            "vendor": "redhat",
            "product": "jboss_amq_clients"
        },
        {
            "vendor": "redhat",
            "product": "jboss_enterprise_application_platform"
        }
    ],
    "kev_detail": null,
    "exploits": [],
    "refs_list": [
        "https://access.redhat.com/errata/RHSA-2020:0497",
        "https://access.redhat.com/errata/RHSA-2020:0567",
        "https://access.redhat.com/errata/RHSA-2020:0601",
        "https://access.redhat.com/errata/RHSA-2020:0605",
        "https://access.redhat.com/errata/RHSA-2020:0606",
        "https://access.redhat.com/errata/RHSA-2020:0804",
        "https://access.redhat.com/errata/RHSA-2020:0805",
        "https://access.redhat.com/errata/RHSA-2020:0806",
        "https://access.redhat.com/errata/RHSA-2020:0811",
        "https://github.com/netty/netty/compare/netty-4.1.43.Final...netty-4.1.44.Final",
        "https://github.com/netty/netty/issues/9861",
        "https://lists.apache.org/thread.html/r030beff88aeb6d7a2d6cd21342bd18686153ce6e26a4171d0e035663%40%3Cissues.flume.apache.org%3E",
        "https://lists.apache.org/thread.html/r1b103833cb5bc8466e24ff0ecc5e75b45a705334ab6a444e64e840a0%40%3Cissues.bookkeeper.apache.org%3E",
        "https://lists.apache.org/thread.html/r1fcccf8bdb3531c28bc9aa605a6a1bea7e68cef6fc12e01faafb2fb5%40%3Cissues.zookeeper.apache.org%3E",
        "https://lists.apache.org/thread.html/r205937c85817a911b0c72655c2377e7a2c9322d6ef6ce1b118d34d8d%40%3Cdev.geode.apache.org%3E",
        "https://lists.apache.org/thread.html/r2f2989b7815d809ff3fda8ce330f553e5f133505afd04ffbc135f35f%40%3Cissues.spark.apache.org%3E",
        "https://lists.apache.org/thread.html/r310d2ce22304d5298ff87f10134f918c87919b452734f9841d95682d%40%3Ccommits.zookeeper.apache.org%3E",
        "https://lists.apache.org/thread.html/r36fcf538b28f2029e8b4f6b9a772f3b107913a78f09b095c5b153a62%40%3Cissues.zookeeper.apache.org%3E",
        "https://lists.apache.org/thread.html/r46f93de62b1e199f3f9babb18128681677c53493546f532ed88c359d%40%3Creviews.spark.apache.org%3E",
        "https://lists.apache.org/thread.html/r4d3f1d3e333d9c2b2f6e6ae8ed8750d4de03410ac294bcd12c7eefa3%40%3Ccommits.cassandra.apache.org%3E",
        "https://lists.apache.org/thread.html/r4ff40646e9ccce13560458419accdfc227b8b6ca4ead3a8a91decc74%40%3Cissues.flume.apache.org%3E",
        "https://lists.apache.org/thread.html/r640eb9b3213058a963e18291f903fc1584e577f60035f941e32f760a%40%3Cissues.zookeeper.apache.org%3E",
        "https://lists.apache.org/thread.html/r6945f3c346b7af89bbd3526a7c9b705b1e3569070ebcd0964bcedd7d%40%3Cissues.zookeeper.apache.org%3E",
        "https://lists.apache.org/thread.html/r70b1ff22ee80e8101805b9a473116dd33265709007d2deb6f8c80bf2%40%3Ccommits.druid.apache.org%3E",
        "https://lists.apache.org/thread.html/r7790b9d99696d9eddce8a8c96f13bb68460984294ea6fea3800143e4%40%3Ccommits.pulsar.apache.org%3E"
    ]
}