{
    "id": "CVE-2009-1955",
    "published": "2009-06-08 01:00:00",
    "last_modified": "2026-06-16 23:08:25",
    "cvss_score": "7.5",
    "cvss_severity": "HIGH",
    "cvss_version": "3.1",
    "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
    "cwe": "CWE-776",
    "description": "The expat XML parser in the apr_xml_* interface in xml/apr_xml.c in Apache APR-util before 1.3.7, as used in the mod_dav and mod_dav_svn modules in the Apache HTTP Server, allows remote attackers to cause a denial of service (memory consumption) via a crafted XML document containing a large number of nested entity references, as demonstrated by a PROPFIND request, a similar issue to CVE-2003-1564.",
    "epss_score": "0.52988",
    "epss_percentile": "0.98943",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 1,
    "updated_at": "2026-09-27 18:17:08",
    "priority": {
        "rank": 2,
        "label": "Patch early",
        "why": "A public exploit exists."
    },
    "products": [
        {
            "vendor": "apache",
            "product": "apr-util"
        },
        {
            "vendor": "apache",
            "product": "http_server"
        },
        {
            "vendor": "apple",
            "product": "mac_os_x"
        },
        {
            "vendor": "canonical",
            "product": "ubuntu_linux"
        },
        {
            "vendor": "debian",
            "product": "debian_linux"
        },
        {
            "vendor": "fedoraproject",
            "product": "fedora"
        },
        {
            "vendor": "oracle",
            "product": "http_server"
        },
        {
            "vendor": "suse",
            "product": "linux_enterprise_server"
        }
    ],
    "kev_detail": null,
    "exploits": [
        {
            "source": "exploit-db",
            "ref_id": "8842",
            "title": "Apache mod_dav / svn - Remote Denial of Service",
            "date": "2009-06-01",
            "url": "https://www.exploit-db.com/exploits/8842"
        }
    ],
    "refs_list": [
        "http://lists.apple.com/archives/security-announce/2009/Nov/msg00000.html",
        "http://lists.opensuse.org/opensuse-security-announce/2010-05/msg00001.html",
        "http://marc.info/?l=apr-dev&m=124396021826125&w=2",
        "http://marc.info/?l=bugtraq&m=129190899612998&w=2",
        "http://secunia.com/advisories/34724",
        "http://secunia.com/advisories/35284",
        "http://secunia.com/advisories/35360",
        "http://secunia.com/advisories/35395",
        "http://secunia.com/advisories/35444",
        "http://secunia.com/advisories/35487",
        "http://secunia.com/advisories/35565",
        "http://secunia.com/advisories/35710",
        "http://secunia.com/advisories/35797",
        "http://secunia.com/advisories/35843",
        "http://secunia.com/advisories/36473",
        "http://secunia.com/advisories/37221",
        "http://security.gentoo.org/glsa/glsa-200907-03.xml",
        "http://slackware.com/security/viewer.php?l=slackware-security&y=2009&m=slackware-security.538210",
        "http://support.apple.com/kb/HT3937",
        "http://svn.apache.org/viewvc?view=rev&revision=781403",
        "http://wiki.rpath.com/Advisories:rPSA-2009-0123",
        "http://www-01.ibm.com/support/docview.wss?uid=swg1PK88342",
        "http://www-01.ibm.com/support/docview.wss?uid=swg1PK91241",
        "http://www-01.ibm.com/support/docview.wss?uid=swg1PK99478",
        "http://www-01.ibm.com/support/docview.wss?uid=swg27014463"
    ]
}