How severe is CVE-2026-71327?

CVE-2026-71327 has a CVSS 4.0 base score of 7.6, rated high severity.

Is CVE-2026-71327 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-71327?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2026-71327 published?

CVE-2026-71327 was published on 2026-08-06 and last updated on 2026-08-07.

CVE-2026-71327

CVE-2026-71327 is a high-severity vulnerability with a CVSS 4.0 base score of 7.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-694.

Key facts

Severity: High (CVSS 4.0 base score 7.6)
EPSS exploit prediction: 0% (30th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-694
Published: 2026-08-06
Last modified: 2026-08-07

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.

Frequently asked questions

What is 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.
How severe is CVE-2026-71327?: CVE-2026-71327 has a CVSS 4.0 base score of 7.6, rated high severity.
Is CVE-2026-71327 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-71327?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2026-71327 published?: CVE-2026-71327 was published on 2026-08-06 and last updated on 2026-08-07.

References

Other CWE-694 vulnerabilities

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CVE-2023-20100 — Medium (CVSS 6.8): A vulnerability in the access point (AP) joining process of the Control and Provisioning of Wireless Access Points…
CVE-2026-57024 — Medium (CVSS 5.3): A Use of Multiple Resources with Duplicate Identifier vulnerability in the IKE daemon (iked) of Juniper Networks Junos…
CVE-2026-5794 — Medium (CVSS 4.9): A vulnerability affecting the detailed versions of Cryptobox allows a legitimate user to prevent another to login by…
CVE-2024-41146 — Medium (CVSS 4.6): Use of Multiple Resources with Duplicate Identifier (CWE-694) in the Controller 6000 and Controller 7000 Platforms…

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