{"cve":"CVE-2026-71325","nvd":{"published":"2026-08-06T22:18:29.490","modified":"2026-09-16T20:46:01.890","status":"Analyzed","description":"Traefik is an open-source edge router that makes publishing services a fun and easy experience. Prior to 2.11.54, 3.6.25, and 3.7.10, cross-namespace @kubernetescrd references are not rejected for TraefikService backend references resolved by the service resolver. A tenant confined by RBAC to a single namespace can therefore bind its own router to a TraefikService owned by another namespace and expose or reroute that namespace's backend, defeating the namespace isolation allowCrossNamespace=false is meant to enforce. This issue is fixed in version 2.11.54, 3.6.25, 3.7.10.","cvss_v4":{"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N","score":4.8},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","score":4.4},"cwes":["CWE-653","CWE-863"],"references":["https://github.com/traefik/traefik/commit/65ebf4b47fbdc33e3856803a5844a404e094d52d","https://github.com/traefik/traefik/releases/tag/v2.11.54","https://github.com/traefik/traefik/releases/tag/v3.6.25","https://github.com/traefik/traefik/releases/tag/v3.7.10","https://github.com/traefik/traefik/security/advisories/GHSA-62fc-8686-hfmq"],"products":["traefik:traefik"],"source":"nvd","synced_at":"2026-10-19T22:47:54.990491175+00:00"},"epss":{"cve":"CVE-2026-71325","score":0.00155,"percentile":0.04602,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-62fc-8686-hfmq","url":"https://osv.dev/vulnerability/GHSA-62fc-8686-hfmq","summary":"Traefik: `allowCrossNamespace=false` bypass via `@kubernetescrd` TraefikService backendRef","modified":"2026-08-18T15:11:01.191262367Z","packages":[{"ecosystem":"Go","name":"github.com/traefik/traefik/v2","purl":"pkg:golang/github.com/traefik/traefik/v2","ranges":["<2.11.54"],"fixed":["2.11.54"]},{"ecosystem":"Go","name":"github.com/traefik/traefik/v3","purl":"pkg:golang/github.com/traefik/traefik/v3","ranges":[">=3.0.0 <3.6.25"],"fixed":["3.6.25"]},{"ecosystem":"Go","name":"github.com/traefik/traefik/v3","purl":"pkg:golang/github.com/traefik/traefik/v3","ranges":[">=3.7.0 <3.7.10"],"fixed":["3.7.10"]},{"ecosystem":"Go","name":"github.com/traefik/traefik","purl":"pkg:golang/github.com/traefik/traefik","ranges":["<=1.7.34"],"fixed":[]}]},{"id":"GO-2026-6203","url":"https://osv.dev/vulnerability/GO-2026-6203","summary":"Traefik: `allowCrossNamespace=false` bypass via `@kubernetescrd` TraefikService backendRef in github.com/traefik/traefik","modified":"2026-08-18T15:00:24.540873843Z","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":["<2.11.54"],"fixed":["2.11.54"]},{"ecosystem":"Go","name":"github.com/traefik/traefik/v3","purl":"pkg:golang/github.com/traefik/traefik/v3","ranges":[">=3.0.0 <3.6.25",">=3.7.0 <3.7.10"],"fixed":["3.6.25","3.7.10"]}]}],"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."]}