Vulnerability in Traefik
CVE-2026-71327
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.005 (41.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 42nd percentile — 41.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Traefik — versions >= 3.0.0, < 3.6.25, >= 3.7.0, < 3.7.10
Weakness classification (CWE)
References
- github.com/traefik/traefik/commit/a764166656f0cd337f917ac76315c381cca844f9 (Patch)
- github.com/traefik/traefik/pull/13580 (Patch, Issue Tracking)
- github.com/traefik/traefik/releases/tag/v3.6.25 (Patch, Release Notes)
- github.com/traefik/traefik/releases/tag/v3.7.10 (Patch, Release Notes)
- github.com/traefik/traefik/security/advisories/GHSA-fgjj-px3w-67xx (Patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-71327?
- CVE-2026-71327 is a high-severity vulnerability in Traefik, classified under Use of Multiple Resources with Duplicate Identifier. CVSS score: 8.1/10. Published 2026-08-06.
- How severe is CVE-2026-71327?
- High severity. CVSS v3 base score is 8.1 out of 10.