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    "cveMetadata": {
        "cveId": "CVE-2026-85596",
        "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "state": "PUBLISHED",
        "assignerShortName": "VulnCheck",
        "dateReserved": "2026-09-04T10:59:00.162Z",
        "datePublished": "2026-09-04T11:30:00.112Z",
        "dateUpdated": "2026-10-08T15:51:48.871Z"
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                "dateUpdated": "2026-10-08T15:51:48.871Z"
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            "datePublic": "2026-08-21T00:00:00.000Z",
            "title": "Traefik v3.7 Authentication Bypass via TLS Option Conflict",
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Traefik versions >= v3.7.0 and <= v3.7.10 contain an authentication bypass in the Kubernetes Ingress NGINX provider. The TLS option generated for an Ingress carrying the nginx.ingress.kubernetes.io/auth-tls-secret annotation was named after the Ingress namespace and name. As a result, two Ingress objects sharing the same host, the same client CA secret, and the same client-authentication mode produced two distinct TLS option names for that host. Traefik treats this as a TLS options conflict and falls back to the entry point's default TLS configuration, which does not request a client certificate, so a route configured with nginx.ingress.kubernetes.io/auth-tls-verify-client: \"on\" becomes reachable without a client certificate. Only the v3.7 line is affected; the issue is fixed in v3.7.11."
                }
            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "description": "Improper Authentication",
                            "cweId": "CWE-287",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "vendor": "traefik",
                    "product": "traefik",
                    "defaultStatus": "unaffected",
                    "packageURL": "pkg:golang/github.com/traefik/traefik/v3",
                    "versions": [
                        {
                            "version": "3.7.0",
                            "status": "affected",
                            "versionType": "semver",
                            "lessThanOrEqual": "3.7.10"
                        }
                    ]
                }
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                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
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                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.7.0",
                                    "versionEndIncluding": "3.7.12"
                                }
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                    "format": "CVSS",
                    "cvssV4_0": {
                        "version": "4.0",
                        "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N",
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "attackRequirements": "PRESENT",
                        "privilegesRequired": "NONE",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "HIGH",
                        "vulnIntegrityImpact": "NONE",
                        "vulnAvailabilityImpact": "NONE",
                        "subConfidentialityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "subAvailabilityImpact": "NONE",
                        "baseScore": 8.2,
                        "baseSeverity": "HIGH"
                    }
                }
            ],
            "references": [
                {
                    "url": "https://github.com/traefik/traefik/security/advisories/GHSA-j994-9gqj-9hwq",
                    "tags": [
                        "vendor-advisory"
                    ],
                    "name": "GitHub Security Advisory (GHSA-j994-9gqj-9hwq)"
                },
                {
                    "name": "VulnCheck Advisory: Traefik v3.7 Authentication Bypass via TLS Option Conflict",
                    "tags": [
                        "third-party-advisory"
                    ],
                    "url": "https://www.vulncheck.com/advisories/traefik-3.7-authentication-bypass-via-tls-option-conflict"
                }
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                    "lang": "en",
                    "value": "james-yusuke",
                    "type": "reporter"
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                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-09-10T14:19:24.535836Z",
                                "id": "CVE-2026-85596",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
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                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
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                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
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                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-09-10T15:09:29.432Z"
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}