{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-65602", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-07-22T10:48:36.000Z", "datePublished": "2026-07-22T11:21:48.127Z", "dateUpdated": "2026-07-22T11:21:48.127Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-07-22T11:21:48.127Z"}, "datePublic": "2026-07-09T00:00:00.000Z", "title": "Traefik before 3.6.23 IngressRouteTCP ServersTransport Namespace Bypass", "descriptions": [{"lang": "en", "value": "Traefik 3.6.0 through 3.6.22 and 3.7.0 through 3.7.6 fail to enforce the crossProviderNamespaces allowlist for IngressRouteTCP service serversTransport references (the allowlist was only enforced for HTTP serversTransport references). A low-privileged Kubernetes user in a namespace not listed in crossProviderNamespaces can set serversTransport: foo@file on an IngressRouteTCP service, causing Traefik to accept the forbidden cross-provider reference and use a file-provider TCPServersTransport \u2014 including privileged backend mTLS client certificates, SPIFFE identity, or PROXY-protocol settings. This is fixed in 3.6.23 and 3.7.7."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "Incorrect Authorization", "cweId": "CWE-863", "type": "CWE"}]}], "affected": [{"vendor": "traefik", "product": "traefik", "defaultStatus": "unaffected", "packageURL": "pkg:golang/Traefik", "versions": [{"version": "3.6.0", "status": "affected", "versionType": "semver", "lessThan": "3.6.23"}, {"version": "3.6.23", "status": "unaffected", "versionType": "semver"}]}, {"vendor": "traefik", "product": "traefik", "defaultStatus": "unaffected", "packageURL": "pkg:golang/Traefik", "versions": [{"version": "3.7.0", "status": "affected", "versionType": "semver", "lessThan": "3.7.7"}, {"version": "3.7.7", "status": "unaffected", "versionType": "semver"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.6.0", "versionEndExcluding": "3.6.23"}, {"vulnerable": true, "criteria": "cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.7.0", "versionEndExcluding": "3.7.7"}]}]}], "metrics": [{"format": "CVSS", "cvssV4_0": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "HIGH", "subIntegrityImpact": "HIGH", "subAvailabilityImpact": "NONE", "baseScore": 5.3, "baseSeverity": "MEDIUM"}}], "references": [{"url": "https://github.com/traefik/traefik/security/advisories/GHSA-42cj-m3vj-89wv", "name": "GitHub Security Advisory (GHSA-42cj-m3vj-89wv)", "tags": ["vendor-advisory"]}, {"url": "https://github.com/traefik/traefik/commit/26c96a3935cafb473f4a5bae1886560d9aa4e4f0", "name": "https://github.com/traefik/traefik/commit/26c96a3935cafb473f4a5bae1886560d9aa4e4f0", "tags": ["patch"]}, {"name": "VulnCheck Advisory: Traefik before 3.6.23 IngressRouteTCP ServersTransport Namespace Bypass", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/traefik-before-ingressroutetcp-serverstransport-namespace-bypass"}], "credits": [{"lang": "en", "value": "CuB3y0nd", "type": "reporter"}, {"lang": "en", "value": "james-yusuke", "type": "reporter"}], "x_generator": {"engine": "vulncheck-endgame"}}}}

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