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Vulnerabilities CVE-2026-71327

CVE-2026-71327

High
Open
TLP:CLEAR

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

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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.

Details

CVSS Score
7.6
EPSS Score
0.36%

29.1th percentile

CVSS Vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Confidence
90%
Published
Aug 6, 2026
Last Modified
Aug 7, 2026
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