medium4.4
CVE-2026-71325
Traefik is an open-source edge router that makes publishing services a fun and easy experience.
Impact
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 packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/traefik/traefik/v2 | <= 2.11.53 | 2.11.54 |
| go | github.com/traefik/traefik/v3 | >= 3.0.0, <= 3.6.24 | 3.6.25 |
| go | github.com/traefik/traefik | <= 1.7.34 | none recorded |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Traefik | Traefik | before 2.11.54 from 3.0.0 before 3.6.25 from 3.7.0 through 3.7.10 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-62fc-8686-hfmq
- 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