{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-88008",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-09-09T19:19:27.406Z",
        "datePublished": "2026-09-10T14:57:06.162Z",
        "dateUpdated": "2026-09-10T16:56:53.731Z"
    },
    "containers": {
        "cna": {
            "title": "Traefik: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') and Incorrect Authorization",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-444",
                            "lang": "en",
                            "description": "CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')",
                            "type": "CWE"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-863",
                            "lang": "en",
                            "description": "CWE-863: Incorrect Authorization",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "attackRequirements": "PRESENT",
                        "privilegesRequired": "NONE",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "NONE",
                        "vulnIntegrityImpact": "NONE",
                        "vulnAvailabilityImpact": "NONE",
                        "subConfidentialityImpact": "HIGH",
                        "subIntegrityImpact": "HIGH",
                        "subAvailabilityImpact": "NONE",
                        "baseScore": 7,
                        "baseSeverity": "HIGH",
                        "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N",
                        "version": "4.0"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/traefik/traefik/security/advisories/GHSA-w4v4-9rw7-5326",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/traefik/traefik/security/advisories/GHSA-w4v4-9rw7-5326"
                },
                {
                    "name": "https://github.com/traefik/traefik/pull/13797",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/traefik/traefik/pull/13797"
                },
                {
                    "name": "https://github.com/traefik/traefik/commit/a277e94664ffc1ce9543df552d3bbf48d4d3b8b3",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/traefik/traefik/commit/a277e94664ffc1ce9543df552d3bbf48d4d3b8b3"
                },
                {
                    "name": "https://github.com/traefik/traefik/releases/tag/v2.11.57",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/traefik/traefik/releases/tag/v2.11.57"
                },
                {
                    "name": "https://github.com/traefik/traefik/releases/tag/v3.7.13",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/traefik/traefik/releases/tag/v3.7.13"
                }
            ],
            "affected": [
                {
                    "vendor": "traefik",
                    "product": "traefik",
                    "versions": [
                        {
                            "version": ">= 2.11.26, < 2.11.57",
                            "status": "affected"
                        },
                        {
                            "version": ">= 3.4.2, < 3.7.13",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-09-10T14:57:06.162Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Traefik is an open source HTTP reverse proxy and load balancer. From 2.11.26 until 2.11.57 and 3.7.13, Traefik forwards a client-supplied Connection header requesting Upgrade, the Upgrade: h2c token, and HTTP2-Settings to a shared backend. If the backend accepts h2c and returns 101 Switching Protocols, Traefik enters a raw tunnel and no longer applies routers, BasicAuth, ForwardAuth, IPAllowList, RateLimit, access logging, metrics, or tracing to later HTTP/2 requests, allowing an unauthenticated request through an unprotected route to reach protected paths on the same backend. This issue is fixed in 2.11.57 and 3.7.13."
                }
            ],
            "source": {
                "advisory": "GHSA-w4v4-9rw7-5326",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-09-10T16:54:44.054899Z",
                                "id": "CVE-2026-88008",
                                "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": "2026-09-10T16:56:53.731Z"
                }
            }
        ]
    }
}