{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.1",
    "cveMetadata": {
        "cveId": "CVE-2025-61771",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2025-09-30T19:43:49.900Z",
        "datePublished": "2025-10-07T14:42:53.366Z",
        "dateUpdated": "2025-10-07T17:52:09.399Z"
    },
    "containers": {
        "cna": {
            "title": "Rack's multipart parser buffers large non‑file fields entirely in memory, enabling DoS (memory exhaustion)",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-400",
                            "lang": "en",
                            "description": "CWE-400: Uncontrolled Resource Consumption",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "HIGH",
                        "baseScore": 7.5,
                        "baseSeverity": "HIGH",
                        "confidentialityImpact": "NONE",
                        "integrityImpact": "NONE",
                        "privilegesRequired": "NONE",
                        "scope": "UNCHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/rack/rack/security/advisories/GHSA-w9pc-fmgc-vxvw",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/rack/rack/security/advisories/GHSA-w9pc-fmgc-vxvw"
                },
                {
                    "name": "https://github.com/rack/rack/commit/589127f4ac8b5cf11cf88fb0cd116ffed4d2181e",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/rack/rack/commit/589127f4ac8b5cf11cf88fb0cd116ffed4d2181e"
                },
                {
                    "name": "https://github.com/rack/rack/commit/d869fed663b113b95a74ad53e1b5cae6ab31f29e",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/rack/rack/commit/d869fed663b113b95a74ad53e1b5cae6ab31f29e"
                },
                {
                    "name": "https://github.com/rack/rack/commit/e08f78c656c9394d6737c022bde087e0f33336fd",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/rack/rack/commit/e08f78c656c9394d6737c022bde087e0f33336fd"
                }
            ],
            "affected": [
                {
                    "vendor": "rack",
                    "product": "rack",
                    "versions": [
                        {
                            "version": "< 2.2.19",
                            "status": "affected"
                        },
                        {
                            "version": ">= 3.1, < 3.1.17",
                            "status": "affected"
                        },
                        {
                            "version": ">= 3.2, < 3.2.2",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2025-10-07T14:42:53.366Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Rack is a modular Ruby web server interface. In versions prior to 2.2.19, 3.1.17, and 3.2.2, ``Rack::Multipart::Parser` stores non-file form fields (parts without a `filename`) entirely in memory as Ruby `String` objects. A single large text field in a multipart/form-data request (hundreds of megabytes or more) can consume equivalent process memory, potentially leading to out-of-memory (OOM) conditions and denial of service (DoS). Attackers can send large non-file fields to trigger excessive memory usage. Impact scales with request size and concurrency, potentially leading to worker crashes or severe garbage-collection overhead. All Rack applications processing multipart form submissions are affected. Versions 2.2.19, 3.1.17, and 3.2.2 enforce a reasonable size cap for non-file fields (e.g., 2 MiB). Workarounds include restricting maximum request body size at the web-server or proxy layer (e.g., Nginx `client_max_body_size`) and validating and rejecting unusually large form fields at the application level."
                }
            ],
            "source": {
                "advisory": "GHSA-w9pc-fmgc-vxvw",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2025-10-07T17:51:58.348077Z",
                                "id": "CVE-2025-61771",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "yes"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2025-10-07T17:52:09.399Z"
                }
            }
        ]
    }
}