{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-66062",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-07-23T23:25:28.896Z",
        "datePublished": "2026-08-07T16:49:43.853Z",
        "dateUpdated": "2026-08-07T21:02:12.997Z"
    },
    "containers": {
        "cna": {
            "title": "SvelteKit: ReDoS (O(n^2)) in content negotiation — unauthenticated DoS via the Accept header",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-1333",
                            "lang": "en",
                            "description": "CWE-1333: Inefficient Regular Expression Complexity",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "LOW",
                        "baseScore": 5.3,
                        "baseSeverity": "MEDIUM",
                        "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:L",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/sveltejs/kit/security/advisories/GHSA-29g2-3rmr-qm68",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/sveltejs/kit/security/advisories/GHSA-29g2-3rmr-qm68"
                },
                {
                    "name": "https://github.com/sveltejs/kit/commit/82712fc02c24b1dcf5b25d7a52129cd8455f04f5",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/sveltejs/kit/commit/82712fc02c24b1dcf5b25d7a52129cd8455f04f5"
                },
                {
                    "name": "https://github.com/sveltejs/kit/releases/tag/@sveltejs/kit@2.70.2",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/sveltejs/kit/releases/tag/@sveltejs/kit@2.70.2"
                }
            ],
            "affected": [
                {
                    "vendor": "sveltejs",
                    "product": "kit",
                    "versions": [
                        {
                            "version": "< 2.70.2",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-08-07T16:49:43.853Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "SvelteKit is a framework for rapidly developing robust, performant web applications using Svelte. Prior to 2.70.2, the content negotiation header parser used by SvelteKit's request handling (for headers such as Accept) uses a regular expression vulnerable to quadratic backtracking, so a maliciously crafted header value can cause excessive CPU consumption and degrade or deny service. Version 2.70.2 fixes the issue."
                }
            ],
            "source": {
                "advisory": "GHSA-29g2-3rmr-qm68",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-08-07T20:58:04.458547Z",
                                "id": "CVE-2026-66062",
                                "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": "2026-08-07T21:02:12.997Z"
                }
            }
        ]
    }
}