high8.1
CVE-2026-71327
Traefik: Gateway API route identity collision allows cross-namespace backend hijacking
Impact
Traefik is an open source HTTP reverse proxy and load balancer. From 3.0.0 until 3.6.25 and 3.7.10, Traefik's Kubernetes Gateway API provider in pkg/provider/kubernetes/gateway/httproute.go, grpcroute.go, tcproute.go, and tlsroute.go builds HTTPRoute, GRPCRoute, TCPRoute, and TLSRoute router and service identities by hyphen-concatenating namespace, route name, Gateway identity, entry point, and rule index, allowing colliding Routes to overwrite another namespace's backend. This issue is fixed in 3.6.25 and 3.7.10.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/traefik/traefik/v3 | >= 3.0.0, < 3.6.25 | 3.6.25 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Traefik | Traefik | from 3.0.0 before 3.6.25 from 3.7.0 before 3.7.10 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-fgjj-px3w-67xx
- https://github.com/traefik/traefik/security/advisories/GHSA-fgjj-px3w-67xx
- https://github.com/traefik/traefik/pull/13580
- https://github.com/traefik/traefik/commit/a764166656f0cd337f917ac76315c381cca844f9
- https://github.com/traefik/traefik/releases/tag/v3.6.25
- https://github.com/traefik/traefik/releases/tag/v3.7.10