{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-88009", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-09-09T19:19:27.406Z", "datePublished": "2026-09-10T15:01:56.971Z", "dateUpdated": "2026-09-10T15:40:16.096Z"}, "containers": {"cna": {"title": "Traefik: Rootless HTTP/1 request-target routes as \"/\" but is forwarded verbatim, bypassing path-scoped routing, middleware guards and access logging", "problemTypes": [{"descriptions": [{"cweId": "CWE-444", "lang": "en", "description": "CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-1286", "lang": "en", "description": "CWE-1286: Improper Validation of Syntactic Correctness of Input", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "LOW", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 8.8, "baseSeverity": "HIGH", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N", "version": "4.0"}}], "references": [{"name": "https://github.com/traefik/traefik/security/advisories/GHSA-f52w-8j3h-j724", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/traefik/traefik/security/advisories/GHSA-f52w-8j3h-j724"}, {"name": "https://github.com/traefik/traefik/pull/13796", "tags": ["x_refsource_MISC"], "url": "https://github.com/traefik/traefik/pull/13796"}, {"name": "https://github.com/traefik/traefik/commit/58d1e9ca204526823211e30fd4634101c59d58e9", "tags": ["x_refsource_MISC"], "url": "https://github.com/traefik/traefik/commit/58d1e9ca204526823211e30fd4634101c59d58e9"}, {"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": "< 2.11.57", "status": "affected"}, {"version": ">= 3.0.0, < 3.7.13", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-09-10T15:01:56.971Z"}, "descriptions": [{"lang": "en", "value": "Traefik is an open source HTTP reverse proxy and load balancer. Prior to 2.11.57, and 3.7.13, Traefik accepts a rootless HTTP/1 request target that Go stores in URL.Opaque while leaving URL.Path empty. The rewriteRequestBuilder path evaluates routing, path sanitization, forwardAuth, encodedCharacters, and access logging against a path normalized to / but forwards URL.Opaque verbatim to the backend, allowing cross-vhost routing bypass, path-scoped authorization bypass, and access-log evasion when the backend interprets the opaque target as a path. This issue is fixed in 2.11.57 and 3.7.13."}], "source": {"advisory": "GHSA-f52w-8j3h-j724", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-09-10T15:39:54.256441Z", "id": "CVE-2026-88009", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"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": "2026-09-10T15:40:16.096Z"}}]}}

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