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CVE-2026-71325

Traefik: `allowCrossNamespace=false` bypass via `@kubernetescrd` TraefikService backendRef PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
traefik / traefikaffected < 2.11.54; affected >= 3.0.0, < 3.6.25; affected >= 3.7.0, < 3.7.10

CWE

CWE-653, CWE-863

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.