CVE-2026-44774
Traefik: Gateway API TraefikService backend accepts rest@internal, allowing unauthorized exposure of the REST provider despite providers.rest.insecure=false
Impact
Traefik is an HTTP reverse proxy and load balancer. Prior to 2.11.46, 3.6.17, and 3.7.1, Traefik's Kubernetes Gateway API provider allows a tenant with HTTPRoute creation permissions to expose the REST provider handler, bypassing the providers.rest.insecure=false setting. The Gateway provider accepts any TraefikService backend reference whose name ends with @internal, making it possible to route traffic to rest@internal in addition to the intended api@internal. In shared Gateway deployments where the REST provider is enabled, this allows a low-privileged actor to gain live dynamic configuration write access to Traefik, enabling unauthorized reconfiguration of routers and services. This vulnerability is fixed in 2.11.46, 3.6.17, and 3.7.1.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/traefik/traefik/v3 | = 3.7.0 | 3.7.1 |
| go | github.com/traefik/traefik/v2 | <= 2.11.45 | 2.11.46 |
| go | github.com/traefik/traefik | <= 1.7.34 | none recorded |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Traefik | Traefik | before 2.11.46 from 3.0.0 before 3.6.17 from 3.7.0 before 3.7.1 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-96qj-4jj5-wcjc
- https://github.com/traefik/traefik/security/advisories/GHSA-96qj-4jj5-wcjc
- https://github.com/traefik/traefik/releases/tag/v2.11.46
- https://github.com/traefik/traefik/releases/tag/v3.6.17
- https://github.com/traefik/traefik/releases/tag/v3.7.1
- https://nvd.nist.gov/vuln/detail/CVE-2026-44774
- https://access.redhat.com/errata/RHSA-2026:36820
- https://access.redhat.com/security/cve/CVE-2026-44774
- https://bugzilla.redhat.com/show_bug.cgi?id=2477937
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44774.json