{
    "id": "CVE-2021-44790",
    "published": "2021-12-20 12:15:07",
    "last_modified": "2026-06-17 04:12:50",
    "cvss_score": "9.8",
    "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:H",
    "cwe": "CWE-787",
    "description": "A carefully crafted request body can cause a buffer overflow in the mod_lua multipart parser (r:parsebody() called from Lua scripts). The Apache httpd team is not aware of an exploit for the vulnerabilty though it might be possible to craft one. This issue affects Apache HTTP Server 2.4.51 and earlier.",
    "epss_score": "0.96840",
    "epss_percentile": "0.99887",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 1,
    "updated_at": "2026-09-26 18:28:28",
    "priority": {
        "rank": 2,
        "label": "Patch early",
        "why": "A public exploit exists."
    },
    "products": [
        {
            "vendor": "apache",
            "product": "http_server"
        },
        {
            "vendor": "apple",
            "product": "mac_os_x"
        },
        {
            "vendor": "apple",
            "product": "macos"
        },
        {
            "vendor": "debian",
            "product": "debian_linux"
        },
        {
            "vendor": "fedoraproject",
            "product": "fedora"
        },
        {
            "vendor": "netapp",
            "product": "cloud_backup"
        },
        {
            "vendor": "oracle",
            "product": "communications_element_manager"
        },
        {
            "vendor": "oracle",
            "product": "communications_operations_monitor"
        },
        {
            "vendor": "oracle",
            "product": "communications_session_report_manager"
        },
        {
            "vendor": "oracle",
            "product": "communications_session_route_manager"
        },
        {
            "vendor": "oracle",
            "product": "http_server"
        },
        {
            "vendor": "oracle",
            "product": "instantis_enterprisetrack"
        },
        {
            "vendor": "oracle",
            "product": "zfs_storage_appliance_kit"
        },
        {
            "vendor": "tenable",
            "product": "tenable.sc"
        }
    ],
    "kev_detail": null,
    "exploits": [
        {
            "source": "exploit-db",
            "ref_id": "51193",
            "title": "Apache 2.4.x - Buffer Overflow",
            "date": "2023-04-01",
            "url": "https://www.exploit-db.com/exploits/51193"
        }
    ],
    "refs_list": [
        "http://httpd.apache.org/security/vulnerabilities_24.html",
        "http://packetstormsecurity.com/files/171631/Apache-2.4.x-Buffer-Overflow.html",
        "http://seclists.org/fulldisclosure/2022/May/33",
        "http://seclists.org/fulldisclosure/2022/May/35",
        "http://seclists.org/fulldisclosure/2022/May/38",
        "http://www.openwall.com/lists/oss-security/2021/12/20/4",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BFSWOH4X77CV7AH7C4RMHUBDWKQDL4YH/",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RGWILBORT67SHMSLYSQZG2NMXGCMPUZO/",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X73C35MMMZGBVPQQCH7LQZUMYZNQA5FO/",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z7H26WJ6TPKNWV3QKY4BHKUKQVUTZJTD/",
        "https://security.gentoo.org/glsa/202208-20",
        "https://security.netapp.com/advisory/ntap-20211224-0001/",
        "https://support.apple.com/kb/HT213255",
        "https://support.apple.com/kb/HT213256",
        "https://support.apple.com/kb/HT213257",
        "https://www.debian.org/security/2022/dsa-5035",
        "https://www.oracle.com/security-alerts/cpuapr2022.html",
        "https://www.oracle.com/security-alerts/cpujan2022.html",
        "https://www.tenable.com/security/tns-2022-01",
        "https://www.tenable.com/security/tns-2022-03",
        "http://httpd.apache.org/security/vulnerabilities_24.html",
        "http://packetstormsecurity.com/files/171631/Apache-2.4.x-Buffer-Overflow.html",
        "http://seclists.org/fulldisclosure/2022/May/33",
        "http://seclists.org/fulldisclosure/2022/May/35",
        "http://seclists.org/fulldisclosure/2022/May/38"
    ]
}