{
    "id": "CVE-2009-2422",
    "published": "2009-07-10 15:30:00",
    "last_modified": "2026-06-16 23:09:25",
    "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-287",
    "description": "The example code for the digest authentication functionality (http_authentication.rb) in Ruby on Rails before 2.3.3 defines an authenticate_or_request_with_http_digest block that returns nil instead of false when the user does not exist, which allows context-dependent attackers to bypass authentication for applications that are derived from this example by sending an invalid username without a password.",
    "epss_score": "0.03377",
    "epss_percentile": "0.88450",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 0,
    "updated_at": "2026-10-09 18:17:09",
    "priority": {
        "rank": 3,
        "label": "In your normal cycle",
        "why": "Critical by CVSS (9.8), but no sign of active exploitation."
    },
    "products": [
        {
            "vendor": "apple",
            "product": "mac_os_x"
        },
        {
            "vendor": "apple",
            "product": "mac_os_x_server"
        },
        {
            "vendor": "rubyonrails",
            "product": "ruby_on_rails"
        }
    ],
    "kev_detail": null,
    "exploits": [],
    "refs_list": [
        "http://lists.apple.com/archives/security-announce/2010//Mar/msg00001.html",
        "http://n8.tumblr.com/post/117477059/security-hole-found-in-rails-2-3s",
        "http://secunia.com/advisories/35702",
        "http://support.apple.com/kb/HT4077",
        "http://weblog.rubyonrails.org/2009/6/3/security-problem-with-authenticate_with_http_digest",
        "http://www.securityfocus.com/bid/35579",
        "http://www.vupen.com/english/advisories/2009/1802",
        "https://exchange.xforce.ibmcloud.com/vulnerabilities/51528",
        "http://lists.apple.com/archives/security-announce/2010//Mar/msg00001.html",
        "http://n8.tumblr.com/post/117477059/security-hole-found-in-rails-2-3s",
        "http://secunia.com/advisories/35702",
        "http://support.apple.com/kb/HT4077",
        "http://weblog.rubyonrails.org/2009/6/3/security-problem-with-authenticate_with_http_digest",
        "http://www.securityfocus.com/bid/35579",
        "http://www.vupen.com/english/advisories/2009/1802",
        "https://exchange.xforce.ibmcloud.com/vulnerabilities/51528"
    ]
}