{"cve":"CVE-2023-47106","nvd":{"published":"2023-12-04T21:15:33.600","modified":"2026-06-17T06:32:09.667","status":"Modified","description":"Traefik is an open source HTTP reverse proxy and load balancer. When a request is sent to Traefik with a URL fragment, Traefik automatically URL encodes and forwards the fragment to the backend server. This violates RFC 7230 because in the origin-form the URL should only contain the absolute path and the query. When this is combined with another frontend proxy like Nginx, it can be used to bypass frontend proxy URI-based access control restrictions. This vulnerability has been addressed in versions 2.10.6 and 3.0.0-beta5. Users are advised to upgrade. There are no known workarounds for this vulnerability.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","score":6.5},"cwes":["CWE-20"],"references":["https://datatracker.ietf.org/doc/html/rfc7230#section-5.3.1","https://github.com/traefik/traefik/releases/tag/v2.10.6","https://github.com/traefik/traefik/releases/tag/v3.0.0-beta5","https://github.com/traefik/traefik/security/advisories/GHSA-fvhj-4qfh-q2hm","https://datatracker.ietf.org/doc/html/rfc7230#section-5.3.1"],"products":["traefik:traefik"],"source":"nvd","synced_at":"2026-10-19T21:42:34.585441961+00:00"},"epss":{"cve":"CVE-2023-47106","score":0.00625,"percentile":0.50006,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-fvhj-4qfh-q2hm","url":"https://osv.dev/vulnerability/GHSA-fvhj-4qfh-q2hm","summary":"Traefik incorrectly processes fragment in the URL, leads to Authorization Bypass","modified":"2026-08-07T08:12:19.479840773Z","packages":[{"ecosystem":"Go","name":"github.com/traefik/traefik/v2","purl":"pkg:golang/github.com/traefik/traefik/v2","ranges":["<2.10.6"],"fixed":["2.10.6"]},{"ecosystem":"Go","name":"github.com/traefik/traefik/v3","purl":"pkg:golang/github.com/traefik/traefik/v3","ranges":["<3.0.0-beta5"],"fixed":["3.0.0-beta5"]}]},{"id":"GO-2023-2376","url":"https://osv.dev/vulnerability/GO-2023-2376","summary":"Traefik incorrectly processes fragment in the URL, leads to Authorization Bypass in github.com/traefik/traefik","modified":"2026-08-07T08:12:06.071465991Z","packages":[{"ecosystem":"Go","name":"github.com/traefik/traefik","purl":"pkg:golang/github.com/traefik/traefik","ranges":["all versions"],"fixed":[]},{"ecosystem":"Go","name":"github.com/traefik/traefik/v2","purl":"pkg:golang/github.com/traefik/traefik/v2","ranges":["<2.10.6"],"fixed":["2.10.6"]},{"ecosystem":"Go","name":"github.com/traefik/traefik/v3","purl":"pkg:golang/github.com/traefik/traefik/v3","ranges":["<3.0.0-beta5"],"fixed":["3.0.0-beta5"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}