{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-67309", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-07-29T13:06:35.178Z", "datePublished": "2026-08-01T12:22:18.191Z", "dateUpdated": "2026-08-01T12:22:18.191Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-08-01T12:22:18.191Z"}, "datePublic": "2026-07-16T00:00:00.000Z", "title": "Traefik v3.7.0 Path Traversal via RewriteTarget Authentication Bypass", "descriptions": [{"lang": "en", "value": "Traefik versions >= v3.7.0 and <= v3.7.7 contain a path traversal vulnerability in the Kubernetes Ingress NGINX provider's RewriteTarget middleware (generated from the nginx.ingress.kubernetes.io/rewrite-target annotation). When an Ingress path uses a regex that captures attacker-controlled text without requiring a path separator (e.g., path /api(.*) with rewrite target /$1), a crafted request such as /api../admin matches the public router, is rewritten to a dot-segment traversal path (/../admin), and is forwarded without post-replacement normalization validation. A backend that normalizes dot segments resolves the path to a protected endpoint (e.g., /admin) reachable only through a separate router secured with BasicAuth, DigestAuth, or ForwardAuth, resulting in route-level authentication bypass. The issue is fixed in v3.7.8."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')", "cweId": "CWE-22", "type": "CWE"}]}], "affected": [{"vendor": "traefik", "product": "traefik", "defaultStatus": "unaffected", "packageURL": "pkg:golang/Traefik", "versions": [{"version": "3.7.0", "status": "affected", "versionType": "semver", "lessThan": "*"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.7.0", "versionEndExcluding": "*"}]}]}], "metrics": [{"format": "CVSS", "cvssV4_0": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "HIGH", "subIntegrityImpact": "HIGH", "subAvailabilityImpact": "NONE", "baseScore": 7.8, "baseSeverity": "HIGH"}}], "references": [{"url": "https://github.com/traefik/traefik/security/advisories/GHSA-8rxv-jg7p-wvg3", "tags": ["vendor-advisory"], "name": "GitHub Security Advisory (GHSA-8rxv-jg7p-wvg3)"}, {"url": "https://github.com/traefik/traefik/commit/b93f02cd07b79490fb8c8f02e301a7a1ec553195", "tags": ["patch"], "name": "Patch Commit"}, {"url": "https://github.com/traefik/traefik/commit/69259c3acc9d4bdc065cb2e3b83336f7de3e7038", "tags": ["patch"], "name": "Patch Commit"}, {"name": "VulnCheck Advisory: Traefik v3.7.0 Path Traversal via RewriteTarget Authentication Bypass", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/traefik-path-traversal-via-rewritetarget-authentication-bypass"}], "credits": [{"lang": "en", "value": "B1gN0Se", "type": "reporter"}], "x_generator": {"engine": "vulncheck-endgame"}}}}

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{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[3.7.0,*]"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "traefik", "source": "cna", "vendor": "traefik"}, "product": "traefik", "vendor": "traefik"}], "created": "2026-08-01T14:15:03.465985+00:00", "updated": "2026-08-01T14:15:03.466006+00:00", "vendors": ["traefik", "traefik$PRODUCT$traefik"]}