{"id":"CVE-2026-71327","title":"Traefik is an open source HTTP reverse proxy and load balancer","summary":"Traefik is an open source HTTP reverse proxy and load balancer. From 3.0.0 until 3.6.25 and 3.7.10, Traefik's Kubernetes Gateway API provider in pkg/provider/kubernetes/gateway/httproute.go, grpcroute.go, tcproute.go, and tlsroute.go bui…","severity":"high","cvss":8.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","cwe":["CWE-694","CWE-1220"],"vendor":"traefik","product":"traefik","affected":["traefik >= 3.0.0, < 3.6.25","traefik >= 3.7.0, < 3.7.10"],"patched":["traefik 3.7.10"],"published":"2026-08-06","updated":"2026-09-16","sourceUpdated":"2026-09-16T20:44:53.467","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-71327","references":[{"url":"https://github.com/traefik/traefik/commit/a764166656f0cd337f917ac76315c381cca844f9","label":"security-advisories@github.com"},{"url":"https://github.com/traefik/traefik/pull/13580","label":"security-advisories@github.com"},{"url":"https://github.com/traefik/traefik/releases/tag/v3.6.25","label":"security-advisories@github.com"},{"url":"https://github.com/traefik/traefik/releases/tag/v3.7.10","label":"security-advisories@github.com"},{"url":"https://github.com/traefik/traefik/security/advisories/GHSA-fgjj-px3w-67xx","label":"security-advisories@github.com"},{"url":"https://github.com/advisories/GHSA-fgjj-px3w-67xx"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-71327.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-71327"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2512294"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-71327"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-71327"}],"tags":["nvd","ghsa","go","csaf","vex","red-hat"],"epss":0.00481,"epssPercentile":0.38998,"aliases":["GHSA-fgjj-px3w-67xx"],"ecosystem":"go","scores":{"nvd":8.1,"ghsa":8.2,"vendor":8.5},"ingestedAt":"2026-08-06T17:00:12.837Z","slug":"CVE-2026-71327","body":"## Overview\n\nTraefik is an open source HTTP reverse proxy and load balancer. From 3.0.0 until 3.6.25 and 3.7.10, Traefik's Kubernetes Gateway API provider in pkg/provider/kubernetes/gateway/httproute.go, grpcroute.go, tcproute.go, and tlsroute.go builds HTTPRoute, GRPCRoute, TCPRoute, and TLSRoute router and service identities by hyphen-concatenating namespace, route name, Gateway identity, entry point, and rule index, allowing colliding Routes to overwrite another namespace's backend. This issue is fixed in 3.6.25 and 3.7.10.\n\n## Affected\n\n- `traefik >= 3.0.0, < 3.6.25`\n- `traefik >= 3.7.0, < 3.7.10`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `traefik 3.7.10`\n\n## Package advisory (CVE-2026-71327)\n\nAffected packages:\n\n- `github.com/traefik/traefik/v3 >= 3.0.0, < 3.6.25`\n- `github.com/traefik/traefik/v3 >= 3.7.0, < 3.7.10`\n\nPatched in:\n\n- `github.com/traefik/traefik/v3 3.6.25`\n- `github.com/traefik/traefik/v3 3.7.10`\n\nSource: https://github.com/advisories/GHSA-fgjj-px3w-67xx\n\n## Vendor advisories\n\n- **Red Hat VEX** · Important · affected: Red Hat OpenShift Dev Spaces · no fix planned: Red Hat OpenShift Dev Spaces · updated 2026-09-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-71327.json)","depth":"twilight","depthScore":45,"depthScoreParts":{"impact":44.6,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":205759,"id":"CVE-2026-71327","ts":1789592771796,"field":"cvss","old":"8.2","new":"8.1"}]}