Traefik 2.11.46/3.6.17/3.7.1 RCE via Gateway REST provider
CVE-2026-44774 Published on May 15, 2026
Traefik: Gateway API TraefikService backend accepts rest@internal, allowing unauthorized exposure of the REST provider despite providers.rest.insecure=false
Traefik is an HTTP reverse proxy and load balancer. Prior to 2.11.46, 3.6.17, and 3.7.1, Traefik's Kubernetes Gateway API provider allows a tenant with HTTPRoute creation permissions to expose the REST provider handler, bypassing the providers.rest.insecure=false setting. The Gateway provider accepts any TraefikService backend reference whose name ends with @internal, making it possible to route traffic to rest@internal in addition to the intended api@internal. In shared Gateway deployments where the REST provider is enabled, this allows a low-privileged actor to gain live dynamic configuration write access to Traefik, enabling unauthorized reconfiguration of routers and services. This vulnerability is fixed in 2.11.46, 3.6.17, and 3.7.1.
Vulnerability Analysis
CVE-2026-44774 is exploitable with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a small impact on confidentiality, a high impact on integrity and availability.
Weakness Types
What is an Authorization Vulnerability?
The software does not restrict or incorrectly restricts access to a resource from an unauthorized actor.
CVE-2026-44774 has been classified to as an Authorization vulnerability or weakness.
External Control of System or Configuration Setting
One or more system settings or configuration elements can be externally controlled by a user. Allowing external control of system settings can disrupt service or cause an application to behave in unexpected, and potentially malicious ways.
Products Associated with CVE-2026-44774
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Affected Versions
traefik:- Version < 2.11.46 is affected.
- Version >= 3.0.0-beta1, < 3.6.17 is affected.
- Version >= 3.7.0-rc.0, < 3.7.1 is affected.
- Version 1782403274 and below * is unaffected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.