In macOS High Sierra before 10.13.5, an issue existed in CUPS. This issue was addressed with improved access restrictions.
{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "cups",
            "binary_version": "1.7.2-0ubuntu1.10"
        },
        {
            "binary_name": "cups-bsd",
            "binary_version": "1.7.2-0ubuntu1.10"
        },
        {
            "binary_name": "cups-client",
            "binary_version": "1.7.2-0ubuntu1.10"
        },
        {
            "binary_name": "cups-common",
            "binary_version": "1.7.2-0ubuntu1.10"
        },
        {
            "binary_name": "cups-core-drivers",
            "binary_version": "1.7.2-0ubuntu1.10"
        },
        {
            "binary_name": "cups-daemon",
            "binary_version": "1.7.2-0ubuntu1.10"
        },
        {
            "binary_name": "cups-ppdc",
            "binary_version": "1.7.2-0ubuntu1.10"
        },
        {
            "binary_name": "cups-server-common",
            "binary_version": "1.7.2-0ubuntu1.10"
        },
        {
            "binary_name": "libcups2",
            "binary_version": "1.7.2-0ubuntu1.10"
        },
        {
            "binary_name": "libcups2-dev",
            "binary_version": "1.7.2-0ubuntu1.10"
        },
        {
            "binary_name": "libcupscgi1",
            "binary_version": "1.7.2-0ubuntu1.10"
        },
        {
            "binary_name": "libcupscgi1-dev",
            "binary_version": "1.7.2-0ubuntu1.10"
        },
        {
            "binary_name": "libcupsimage2",
            "binary_version": "1.7.2-0ubuntu1.10"
        },
        {
            "binary_name": "libcupsimage2-dev",
            "binary_version": "1.7.2-0ubuntu1.10"
        },
        {
            "binary_name": "libcupsmime1",
            "binary_version": "1.7.2-0ubuntu1.10"
        },
        {
            "binary_name": "libcupsmime1-dev",
            "binary_version": "1.7.2-0ubuntu1.10"
        },
        {
            "binary_name": "libcupsppdc1",
            "binary_version": "1.7.2-0ubuntu1.10"
        },
        {
            "binary_name": "libcupsppdc1-dev",
            "binary_version": "1.7.2-0ubuntu1.10"
        }
    ]
}
          {
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "cups",
            "binary_version": "2.1.3-4ubuntu0.5"
        },
        {
            "binary_name": "cups-bsd",
            "binary_version": "2.1.3-4ubuntu0.5"
        },
        {
            "binary_name": "cups-client",
            "binary_version": "2.1.3-4ubuntu0.5"
        },
        {
            "binary_name": "cups-common",
            "binary_version": "2.1.3-4ubuntu0.5"
        },
        {
            "binary_name": "cups-core-drivers",
            "binary_version": "2.1.3-4ubuntu0.5"
        },
        {
            "binary_name": "cups-daemon",
            "binary_version": "2.1.3-4ubuntu0.5"
        },
        {
            "binary_name": "cups-ipp-utils",
            "binary_version": "2.1.3-4ubuntu0.5"
        },
        {
            "binary_name": "cups-ppdc",
            "binary_version": "2.1.3-4ubuntu0.5"
        },
        {
            "binary_name": "cups-server-common",
            "binary_version": "2.1.3-4ubuntu0.5"
        },
        {
            "binary_name": "libcups2",
            "binary_version": "2.1.3-4ubuntu0.5"
        },
        {
            "binary_name": "libcups2-dev",
            "binary_version": "2.1.3-4ubuntu0.5"
        },
        {
            "binary_name": "libcupscgi1",
            "binary_version": "2.1.3-4ubuntu0.5"
        },
        {
            "binary_name": "libcupscgi1-dev",
            "binary_version": "2.1.3-4ubuntu0.5"
        },
        {
            "binary_name": "libcupsimage2",
            "binary_version": "2.1.3-4ubuntu0.5"
        },
        {
            "binary_name": "libcupsimage2-dev",
            "binary_version": "2.1.3-4ubuntu0.5"
        },
        {
            "binary_name": "libcupsmime1",
            "binary_version": "2.1.3-4ubuntu0.5"
        },
        {
            "binary_name": "libcupsmime1-dev",
            "binary_version": "2.1.3-4ubuntu0.5"
        },
        {
            "binary_name": "libcupsppdc1",
            "binary_version": "2.1.3-4ubuntu0.5"
        },
        {
            "binary_name": "libcupsppdc1-dev",
            "binary_version": "2.1.3-4ubuntu0.5"
        }
    ]
}
          {
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "cups",
            "binary_version": "2.2.7-1ubuntu2.1"
        },
        {
            "binary_name": "cups-bsd",
            "binary_version": "2.2.7-1ubuntu2.1"
        },
        {
            "binary_name": "cups-client",
            "binary_version": "2.2.7-1ubuntu2.1"
        },
        {
            "binary_name": "cups-common",
            "binary_version": "2.2.7-1ubuntu2.1"
        },
        {
            "binary_name": "cups-core-drivers",
            "binary_version": "2.2.7-1ubuntu2.1"
        },
        {
            "binary_name": "cups-daemon",
            "binary_version": "2.2.7-1ubuntu2.1"
        },
        {
            "binary_name": "cups-ipp-utils",
            "binary_version": "2.2.7-1ubuntu2.1"
        },
        {
            "binary_name": "cups-ppdc",
            "binary_version": "2.2.7-1ubuntu2.1"
        },
        {
            "binary_name": "cups-server-common",
            "binary_version": "2.2.7-1ubuntu2.1"
        },
        {
            "binary_name": "libcups2",
            "binary_version": "2.2.7-1ubuntu2.1"
        },
        {
            "binary_name": "libcups2-dev",
            "binary_version": "2.2.7-1ubuntu2.1"
        },
        {
            "binary_name": "libcupscgi1",
            "binary_version": "2.2.7-1ubuntu2.1"
        },
        {
            "binary_name": "libcupsimage2",
            "binary_version": "2.2.7-1ubuntu2.1"
        },
        {
            "binary_name": "libcupsimage2-dev",
            "binary_version": "2.2.7-1ubuntu2.1"
        },
        {
            "binary_name": "libcupsmime1",
            "binary_version": "2.2.7-1ubuntu2.1"
        },
        {
            "binary_name": "libcupsppdc1",
            "binary_version": "2.2.7-1ubuntu2.1"
        }
    ]
}