{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-100409",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-09-25T20:08:33.084Z",
        "datePublished": "2026-10-15T16:57:50.999Z",
        "dateUpdated": "2026-10-15T17:50:33.255Z"
    },
    "containers": {
        "cna": {
            "title": "OpenNext Cloudflare: Cache interception can bypass middleware protection for encoded paths",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-177",
                            "lang": "en",
                            "description": "CWE-177: Improper Handling of URL Encoding (Hex Encoding)",
                            "type": "CWE"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-180",
                            "lang": "en",
                            "description": "CWE-180: Incorrect Behavior Order: Validate Before Canonicalize",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "NONE",
                        "baseScore": 7.5,
                        "baseSeverity": "HIGH",
                        "confidentialityImpact": "HIGH",
                        "integrityImpact": "NONE",
                        "privilegesRequired": "NONE",
                        "scope": "UNCHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/opennextjs/opennextjs-cloudflare/security/advisories/GHSA-2vc4-c4r6-p6v6",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/opennextjs/opennextjs-cloudflare/security/advisories/GHSA-2vc4-c4r6-p6v6"
                },
                {
                    "name": "https://github.com/opennextjs/opennextjs-aws/pull/1199",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/opennextjs/opennextjs-aws/pull/1199"
                },
                {
                    "name": "https://github.com/opennextjs/opennextjs-aws/pull/1200",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/opennextjs/opennextjs-aws/pull/1200"
                },
                {
                    "name": "https://github.com/opennextjs/opennextjs-cloudflare/commit/38ea40b669be272ddf09a7df7e70c69d0b57404b",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/opennextjs/opennextjs-cloudflare/commit/38ea40b669be272ddf09a7df7e70c69d0b57404b"
                },
                {
                    "name": "https://github.com/opennextjs/opennextjs-cloudflare/releases/tag/@opennextjs/cloudflare@1.20.2",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/opennextjs/opennextjs-cloudflare/releases/tag/@opennextjs/cloudflare@1.20.2"
                }
            ],
            "affected": [
                {
                    "vendor": "opennextjs",
                    "product": "opennextjs-cloudflare",
                    "versions": [
                        {
                            "version": ">= 0.3.0, < 1.20.2",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-10-15T16:57:50.999Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "OpenNext Cloudflare is an open Next.js adapter for Cloudflare. From 0.3.0 until 1.20.2, applications that enable enableCacheInterception, rely on middleware for access control, and have a matching cached protected route process encoded pathnames inconsistently between middleware matching and cache lookup. An unauthenticated attacker can use a percent-encoded pathname that does not match authorization middleware but decodes to the cache key of a protected route, causing cached content to be returned without authorization. Malformed encodings can also be partially decoded, allowing cache lookup to continue with a pathname that middleware did not evaluate consistently. This issue is fixed in version 1.20.2."
                }
            ],
            "source": {
                "advisory": "GHSA-2vc4-c4r6-p6v6",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-10-15T17:50:22.601978Z",
                                "id": "CVE-2026-100409",
                                "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": "2026-10-15T17:50:33.255Z"
                }
            }
        ]
    }
}