{"cve":"CVE-2022-23632","nvd":{"published":"2022-02-17T15:15:09.580","modified":"2026-06-17T04:30:31.447","status":"Modified","description":"Traefik is an HTTP reverse proxy and load balancer. Prior to version 2.6.1, Traefik skips the router transport layer security (TLS) configuration when the host header is a fully qualified domain name (FQDN). For a request, the TLS configuration choice can be different than the router choice, which implies the use of a wrong TLS configuration. When sending a request using FQDN handled by a router configured with a dedicated TLS configuration, the TLS configuration falls back to the default configuration that might not correspond to the configured one. If the CNAME flattening is enabled, the selected TLS configuration is the SNI one and the routing uses the CNAME value, so this can skip the expected TLS configuration. Version 2.6.1 contains a patch for this issue. As a workaround, one may add the FDQN to the host rule. However, there is no workaround if the CNAME flattening is enabled.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","score":7.5},"cwes":["CWE-295"],"references":["https://github.com/traefik/traefik/pull/8764","https://github.com/traefik/traefik/releases/tag/v2.6.1","https://github.com/traefik/traefik/security/advisories/GHSA-hrhx-6h34-j5hc","https://www.oracle.com/security-alerts/cpujul2022.html","https://github.com/traefik/traefik/pull/8764"],"products":["oracle:communications_unified_inventory_management","traefik:traefik"],"source":"nvd","synced_at":"2026-10-19T21:28:04.509275555+00:00"},"epss":{"cve":"CVE-2022-23632","score":0.01714,"percentile":0.77402,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-hrhx-6h34-j5hc","url":"https://osv.dev/vulnerability/GHSA-hrhx-6h34-j5hc","summary":"Skip the router TLS configuration when the host header is an FQDN","modified":"2024-08-21T14:56:40.868194Z","packages":[{"ecosystem":"Go","name":"github.com/traefik/traefik/v2","purl":"pkg:golang/github.com/traefik/traefik/v2","ranges":["<2.6.1"],"fixed":["2.6.1"]}]},{"id":"GO-2022-0325","url":"https://osv.dev/vulnerability/GO-2022-0325","summary":"Skip the router TLS configuration when the host header is an FQDN in github.com/traefik/traefik","modified":"2026-03-03T04:52:06.901449Z","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":["<2.6.1"],"fixed":["2.6.1"]}]}],"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."]}