{
    "id": "CVE-2010-1866",
    "published": "2010-05-07 23:00:01",
    "last_modified": "2026-06-16 23:19:29",
    "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-190",
    "description": "The dechunk filter in PHP 5.3 through 5.3.2, when decoding an HTTP chunked encoding stream, allows context-dependent attackers to cause a denial of service (crash) and possibly trigger memory corruption via a negative chunk size, which bypasses a signed comparison, related to an integer overflow in the chunk size decoder.",
    "epss_score": "0.06723",
    "epss_percentile": "0.93714",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 1,
    "updated_at": "2026-09-27 18:17:09",
    "priority": {
        "rank": 2,
        "label": "Patch early",
        "why": "A public exploit exists."
    },
    "products": [
        {
            "vendor": "opensuse",
            "product": "opensuse"
        },
        {
            "vendor": "php",
            "product": "php"
        },
        {
            "vendor": "suse",
            "product": "linux_enterprise"
        }
    ],
    "kev_detail": null,
    "exploits": [
        {
            "source": "exploit-db",
            "ref_id": "33920",
            "title": "PHP 5.3 - 'PHP_dechunk()' HTTP Chunked Encoding Integer Overflow",
            "date": "2010-05-02",
            "url": "https://www.exploit-db.com/exploits/33920"
        }
    ],
    "refs_list": [
        "http://lists.opensuse.org/opensuse-security-announce/2010-09/msg00006.html",
        "http://php-security.org/2010/05/02/mops-2010-003-php-dechunk-filter-signed-comparison-vulnerability/index.html",
        "http://lists.opensuse.org/opensuse-security-announce/2010-09/msg00006.html",
        "http://php-security.org/2010/05/02/mops-2010-003-php-dechunk-filter-signed-comparison-vulnerability/index.html"
    ]
}