{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.1",
    "cveMetadata": {
        "cveId": "CVE-2025-30218",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2025-03-18T18:15:13.850Z",
        "datePublished": "2025-04-02T21:23:14.660Z",
        "dateUpdated": "2025-10-13T15:37:02.310Z"
    },
    "containers": {
        "cna": {
            "title": "Next.js may leak x-middleware-subrequest-id to external hosts",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-200",
                            "lang": "en",
                            "description": "CWE-200: Exposure of Sensitive Information to an Unauthorized Actor",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "attackVector": "NETWORK",
                        "attackComplexity": "HIGH",
                        "attackRequirements": "PRESENT",
                        "privilegesRequired": "NONE",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "LOW",
                        "vulnIntegrityImpact": "NONE",
                        "vulnAvailabilityImpact": "NONE",
                        "subConfidentialityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "subAvailabilityImpact": "NONE",
                        "baseScore": 1.7,
                        "baseSeverity": "LOW",
                        "vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U",
                        "version": "4.0"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/vercel/next.js/security/advisories/GHSA-223j-4rm8-mrmf",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/vercel/next.js/security/advisories/GHSA-223j-4rm8-mrmf"
                },
                {
                    "name": "https://vercel.com/changelog/cve-2025-30218-5DREmEH765PoeAsrNNQj3O",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://vercel.com/changelog/cve-2025-30218-5DREmEH765PoeAsrNNQj3O"
                }
            ],
            "affected": [
                {
                    "vendor": "vercel",
                    "product": "next.js",
                    "versions": [
                        {
                            "version": "= 12.3.5",
                            "status": "affected"
                        },
                        {
                            "version": "= 13.5.9",
                            "status": "affected"
                        },
                        {
                            "version": "= 14.2.25",
                            "status": "affected"
                        },
                        {
                            "version": "= 15.2.3",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2025-10-13T15:37:02.310Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Next.js is a React framework for building full-stack web applications. To mitigate CVE-2025-29927, Next.js validated the x-middleware-subrequest-id which persisted across multiple incoming requests. However, this subrequest ID is sent to all requests, even if the destination is not the same host as the Next.js application. Initiating a fetch request to a third-party within Middleware will send the x-middleware-subrequest-id to that third party. This vulnerability is fixed in 12.3.6, 13.5.10, 14.2.26, and 15.2.4."
                }
            ],
            "source": {
                "advisory": "GHSA-223j-4rm8-mrmf",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2025-04-03T13:43:59.337390Z",
                                "id": "CVE-2025-30218",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "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": "2025-04-03T13:44:11.988Z"
                }
            }
        ]
    }
}