{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-65601", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-07-22T10:48:36.000Z", "datePublished": "2026-07-22T11:21:47.468Z", "dateUpdated": "2026-10-08T15:51:40.148Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-10-08T15:51:40.148Z" }, "datePublic": "2026-07-09T00:00:00.000Z", "title": "Traefik before 3.7.7 Namespace Confusion via HTTPRoute ExtensionRef", "descriptions": [ { "lang": "en", "value": "Traefik versions 3.7.0 through 3.7.6 contain a namespace confusion vulnerability in the Kubernetes Gateway API provider. When resolving HTTPRoute.spec.rules[].backendRefs[].filters[].extensionRef, Traefik used the backend Service namespace instead of the HTTPRoute namespace. A low-privileged route author holding a ReferenceGrant for a cross-namespace Service could therefore bind a Traefik Middleware from the backend namespace without a separate grant for that middleware, potentially injecting trusted reverse-proxy identity headers into downstream requests. The issue is fixed in version 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/github.com/traefik/traefik/v3", "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": "3.7.0", "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-qq9q-x9w4-chhj", "name": "GitHub Security Advisory (GHSA-qq9q-x9w4-chhj)", "tags": [ "vendor-advisory" ] }, { "url": "https://github.com/traefik/traefik/commit/26c96a3935cafb473f4a5bae1886560d9aa4e4f0", "name": "Patch Commit", "tags": [ "patch" ] }, { "name": "VulnCheck Advisory: Traefik before 3.7.7 Namespace Confusion via HTTPRoute ExtensionRef", "tags": [ "third-party-advisory" ], "url": "https://www.vulncheck.com/advisories/traefik-before-namespace-confusion-via-httproute-extensionref" } ], "credits": [ { "lang": "en", "value": "CuB3y0nd", "type": "reporter" } ], "x_generator": { "engine": "vulncheck-endgame" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2026-07-23T13:51:09.038759Z", "id": "CVE-2026-65601", "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": "2026-07-23T13:51:17.922Z" } } ] } }