{"id":"GO-2025-4206","summary":"Path Normalization Bypass in Traefik Router + Middleware Rules in github.com/traefik/traefik","details":"Path Normalization Bypass in Traefik Router + Middleware Rules in github.com/traefik/traefik","aliases":["CVE-2025-66490","GHSA-gm3x-23wp-hc2c"],"modified":"2026-03-17T05:01:29.799404Z","published":"2025-12-15T19:37:35Z","database_specific":{"url":"https://pkg.go.dev/vuln/GO-2025-4206","review_status":"UNREVIEWED"},"references":[{"type":"ADVISORY","url":"https://github.com/traefik/traefik/security/advisories/GHSA-gm3x-23wp-hc2c"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-66490"},{"type":"WEB","url":"https://github.com/traefik/traefik/releases/tag/v2.11.32"},{"type":"WEB","url":"https://github.com/traefik/traefik/releases/tag/v3.6.4"}],"affected":[{"package":{"name":"github.com/traefik/traefik","ecosystem":"Go","purl":"pkg:golang/github.com/traefik/traefik"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://vuln.go.dev/ID/GO-2025-4206.json"}},{"package":{"name":"github.com/traefik/traefik/v2","ecosystem":"Go","purl":"pkg:golang/github.com/traefik/traefik/v2"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2.11.32"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://vuln.go.dev/ID/GO-2025-4206.json"}},{"package":{"name":"github.com/traefik/traefik/v3","ecosystem":"Go","purl":"pkg:golang/github.com/traefik/traefik/v3"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.6.3"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://vuln.go.dev/ID/GO-2025-4206.json"}}],"schema_version":"1.7.5"}