{"cve":{"cve_id":"CVE-2026-48020","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":null,"epss_percentile":null,"epss_as_of":null,"description":"Traefik is an HTTP reverse proxy and load balancer. Prior to 2.11.48, 3.6.19, and 3.7.3, there is a high severity vulnerability in Traefik's StripPrefix middleware that allows an unauthenticated attacker to bypass route-level authentication and authorization. When a public router matches on a PathPrefix rule and applies the StripPrefix middleware, a request path containing .. or its percent-encoded form %2e%2e can match the public route at routing time and then, after the prefix is stripped and the path is normalized, resolve to a path served by a separate, authenticated router. As a result, an attacker can reach protected backend paths — such as admin or internal configuration endpoints — without satisfying the authentication middleware attached to the protected router. This vulnerability is fixed in 2.11.48, 3.6.19, and 3.7.3.","published_at":"2026-06-23T19:10:31.557000Z","last_modified_at":null,"cvss_v3_score":null,"cvss_v3_vector":null,"cvss_v3_severity":null,"cvss_v4_score":7.8,"cvss_v4_vector":"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","cvss_v4_severity":"HIGH","ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":["CWE-288"],"nvd_references":["https://github.com/traefik/traefik/security/advisories/GHSA-xf64-8mw2-4gr2","https://github.com/traefik/traefik/releases/tag/v2.11.48","https://github.com/traefik/traefik/releases/tag/v3.6.19","https://github.com/traefik/traefik/releases/tag/v3.7.3"],"vuln_status":null,"trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-28T17:55:03.830140Z","updated_at":"2026-06-28T23:30:42.157376Z"},"effective_severity":"HIGH","badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":null,"metrics":[]},"cvss_v4_decoded":{"version":"4.0","metrics":[{"metric":"AV","name":"Attack Vector","value":"N","value_label":"Network"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"AT","name":"Attack Requirements","value":"N","value_label":"None"},{"metric":"PR","name":"Privileges Required","value":"N","value_label":"None"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"VC","name":"Confidentiality (Vulnerable System)","value":"N","value_label":"None"},{"metric":"VI","name":"Integrity (Vulnerable System)","value":"N","value_label":"None"},{"metric":"VA","name":"Availability (Vulnerable System)","value":"N","value_label":"None"},{"metric":"SC","name":"Confidentiality (Subsequent System)","value":"H","value_label":"High"},{"metric":"SI","name":"Integrity (Subsequent System)","value":"H","value_label":"High"},{"metric":"SA","name":"Availability (Subsequent System)","value":"N","value_label":"None"}]},"affected":[{"vendor_slug":"traefik","vendor_name":"traefik","product_slug":"traefik","product_name":"traefik","version_start":">= 3.7.0-ea.1, < 3.7.3","version_start_inclusive":true,"version_end":">= 3.7.0-ea.1, < 3.7.3","version_end_inclusive":true,"cpe23_uri":"cve5:traefik:traefik:>= 3.7.0-ea.1, < 3.7.3:>= 3.7.0-ea.1, < 3.7.3"},{"vendor_slug":"traefik","vendor_name":"traefik","product_slug":"traefik","product_name":"traefik","version_start":">= 3.0.0-beta1, < 3.6.19","version_start_inclusive":true,"version_end":">= 3.0.0-beta1, < 3.6.19","version_end_inclusive":true,"cpe23_uri":"cve5:traefik:traefik:>= 3.0.0-beta1, < 3.6.19:>= 3.0.0-beta1, < 3.6.19"},{"vendor_slug":"traefik","vendor_name":"traefik","product_slug":"traefik","product_name":"traefik","version_start":"< 2.11.48","version_start_inclusive":true,"version_end":"< 2.11.48","version_end_inclusive":true,"cpe23_uri":"cve5:traefik:traefik:< 2.11.48:< 2.11.48"}],"exploit_refs":[],"news":[],"references":[{"url":"https://github.com/traefik/traefik/security/advisories/GHSA-xf64-8mw2-4gr2","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://github.com/traefik/traefik/releases/tag/v2.11.48","source_type":"PATCH","tags":["patch"]},{"url":"https://github.com/traefik/traefik/releases/tag/v3.6.19","source_type":"PATCH","tags":["patch"]},{"url":"https://github.com/traefik/traefik/releases/tag/v3.7.3","source_type":"PATCH","tags":["patch"]}],"timeline":[{"type":"published","at":"2026-06-23T19:10:31.557000Z","label":"CVE published","source":null}]}