CVE-2026-71327
High
Description
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.
SeverityHigh
CVSS8.1
Exploit probability42. percentile0.5%
Product
Traefik
PublishedAug 6, 2026
First seenAug 6, 2026
Weakness typeCWE-694CWE-694
How to fix
Update
- traefik traefik3.6.25, 3.7.10 or later
- github.com/traefik/traefik/v33.6.25, 3.7.10 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| traefik traefik | 3.0.0 ≤ v < 3.6.25, 3.7.0 ≤ v < 3.7.10 | 3.6.25, 3.7.10 |
| github.com/traefik/traefik/v3Go | 3.0.0 ≤ v < 3.6.25, 3.7.0 ≤ v < 3.7.10 | 3.6.25, 3.7.10 |
| github.com/traefik/traefikGo | No range specified | — |
| github.com/traefik/traefik/v2Go | No range specified | — |
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