{"schema":"threatline.record/2","record":{"id":"CVE-2026-88009","aliases":["GHSA-f52w-8j3h-j724","GO-2026-6465"],"summary":"Traefik: Rootless HTTP/1 request-target routes as \"/\" but is forwarded verbatim, bypassing path-scoped routing, middleware guards and access logging","details":"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.","categories":["Libraries & packages"],"product":"traefik","vendor":"traefik","ecosystem":"Go","affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-88009","source_modified_at":"2026-09-10T15:40:16.096Z","fetched_at":"2026-10-25T01:05:06.841276Z","product":"traefik","vendor":"traefik","versions":[{"version":"< 2.11.57","status":"affected"},{"version":">= 3.0.0, < 3.7.13","status":"affected"}],"defaultStatus":null},{"source":"OSV","source_url":"https://osv.dev/vulnerability/GHSA-f52w-8j3h-j724","source_modified_at":"2026-09-17T17:40:41.068634322Z","fetched_at":"2026-10-25T01:05:06.841276Z","package":{"name":"github.com/traefik/traefik/v3","ecosystem":"Go","purl":"pkg:golang/github.com/traefik/traefik/v3"},"ranges":[{"type":"SEMVER","events":[{"introduced":"3.0.0"},{"fixed":"3.7.13"}]}],"versions":[]},{"source":"OSV","source_url":"https://osv.dev/vulnerability/GHSA-f52w-8j3h-j724","source_modified_at":"2026-09-17T17:40:41.068634322Z","fetched_at":"2026-10-25T01:05:06.841276Z","package":{"name":"github.com/traefik/traefik/v2","ecosystem":"Go","purl":"pkg:golang/github.com/traefik/traefik/v2"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2.11.57"}]}],"versions":[]}],"fixed_versions":[{"source":"OSV","source_url":"https://osv.dev/vulnerability/GHSA-f52w-8j3h-j724","source_modified_at":"2026-09-17T17:40:41.068634322Z","fetched_at":"2026-10-25T01:05:06.841276Z","package":{"name":"github.com/traefik/traefik/v3","ecosystem":"Go","purl":"pkg:golang/github.com/traefik/traefik/v3"},"version":"3.7.13"},{"source":"OSV","source_url":"https://osv.dev/vulnerability/GHSA-f52w-8j3h-j724","source_modified_at":"2026-09-17T17:40:41.068634322Z","fetched_at":"2026-10-25T01:05:06.841276Z","package":{"name":"github.com/traefik/traefik/v2","ecosystem":"Go","purl":"pkg:golang/github.com/traefik/traefik/v2"},"version":"2.11.57"}],"cvss":8.8,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00443,"percentile":0.37595,"score_date":"2026-10-24"},"published_at":"2026-09-10T15:01:56.971Z","modified_at":"2026-09-17T17:40:41.068634322Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-88009","fetched_at":"2026-10-25T01:05:06.841276Z","source_modified_at":"2026-09-10T15:40:16.096Z"},{"source":"OSV","url":"https://osv.dev/vulnerability/GHSA-f52w-8j3h-j724","fetched_at":"2026-10-25T01:05:06.841276Z","source_modified_at":"2026-09-17T17:40:41.068634322Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-88009","fetched_at":"2026-10-25T01:05:06.841276Z","source_modified_at":"2026-10-24"}],"sources":["CVE List","OSV","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/traefik/traefik/security/advisories/GHSA-f52w-8j3h-j724","tags":["x_refsource_CONFIRM"]},{"source":"CVE List","url":"https://github.com/traefik/traefik/pull/13796","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/traefik/traefik/commit/58d1e9ca204526823211e30fd4634101c59d58e9","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/traefik/traefik/releases/tag/v2.11.57","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/traefik/traefik/releases/tag/v3.7.13","tags":["x_refsource_MISC"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"yes","technical_impact":"partial","assessed_at":"2026-09-10T15:39:54.256441Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"ecosystem","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-09-17T17:40:41.068634322Z","content_hash":"cb7d693b5039254d194f5572c5d2f6caea9d479fcc76fd04f0c3b635c70ade96"}}