CVE-2026-44774— Traefik: Gateway API TraefikService backend accepts rest@internal, allowing unauthorized exposure of the REST provider despite providers.rest.insecure=false
Possible ATT&CK Techniques 3AI
T1059 · Command and Scripting Interpreter T1190 · Exploit Public-Facing Application T1484 · Domain or Tenant Policy ModificationGet alerts for future matching vulnerabilitiesLog in to subscribe
I. Basic Information for CVE-2026-44774
Vulnerability Information
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Vulnerability Title
Traefik: Gateway API TraefikService backend accepts rest@internal, allowing unauthorized exposure of the REST provider despite providers.rest.insecure=false
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
访问控制不恰当
Source: NVD (National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-44774
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- https://github.com/traefik/traefik/releases/tag/v3.7.1x_refsource_MISC
- https://github.com/traefik/traefik/releases/tag/v3.6.17x_refsource_MISC
- https://github.com/traefik/traefik/releases/tag/v2.11.46x_refsource_MISC
- https://github.com/traefik/traefik/security/advisories/GHSA-96qj-4jj5-wcjcx_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2026-44774
IV. Related Vulnerabilities
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Same vendor: traefik
- CVE-2026-41181
Traefik: Errors middleware forwards Authorization and Cookie - CVE-2026-41263
Traefik: BasicAuth middleware: timing side-channel vulnerabi - CVE-2026-40912
Traefik: StripPrefixRegex auth bypass via Path/RawPath desyn - CVE-2026-39858
Traefik: Forwarded alias spoofing top pre-auth decision bypa - CVE-2026-35051
Traefik: ForwardAuth trustForwardHeader=false allows spoofed
Same weakness: CWE-284
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V. Comments for CVE-2026-44774
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