CVE-2026-71325
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
Summary
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 Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| traefik | traefik | < 2.11.54 | affected |
| traefik | traefik | >= 3.0.0, < 3.6.25 | affected |
| traefik | traefik | >= 3.7.0, < 3.7.10 | affected |
Weaknesses
- CWE-653: CWE-653: Improper Isolation or Compartmentalization
- CWE-863: CWE-863: Incorrect Authorization
References
- https://github.com/traefik/traefik/security/advisories/GHSA-62fc-8686-hfmq
- 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
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