CVE-2026-71327

Traefik: Gateway API route identity collision allows cross-namespace backend hijacking

Published: Aug 6, 2026Updated: Sep 16, 2026 Sources: CVE List NVDCWE-694

8.1HIGH

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.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:LPrivileges Required

Low

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:HConfidentiality

High

I:HIntegrity

High

A:NAvailability

None

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Weaknesses

CWE-694

Affected Products

traefik

oss-projectaka traefik enterprise

traefikOn-prem

Networking Infrastructure / load-balancer-proxy

Exploitability

Official Patch Available

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References

https://github.com/traefik/traefik/commit/a764166656f0cd337f917ac76315c381cca844f9

github.com

https://github.com/traefik/traefik/pull/13580

github.com

https://github.com/traefik/traefik/releases/tag/v3.6.25

github.com

and 2 more references View all →

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