Riskcovery

CVE-2026-44774

Traefik: Gateway API TraefikService backend accepts rest@internal, allowing unauthorized exposure of the REST provider despite providers.rest.insecure=false

State
Published
Severity
6.4 Medium
Published
May 15, 2026
Updated
Aug 13, 2026
Reserved
May 7, 2026

Read the record on cve.org

Description

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.

Scores

CVSSScoreVectorSource
4.06.4 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:H/SA:HGitHub_M
3.18.3 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:Hredhat-SADP

Weaknesses

  • CWE-284 Improper Access Control
  • CWE-15 External Control of System or Configuration Setting

Affected Products

ProductVersions
traefiktraefik
  • < 2.11.46Affected
  • >= 3.0.0-beta1, < 3.6.17Affected
  • >= 3.7.0-rc.0, < 3.7.1Affected

References

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