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CVE-2026-44774— Traefik: Gateway API TraefikService backend accepts rest@internal, allowing unauthorized exposure of the REST provider despite providers.rest.insecure=false

Quick assessment

Affected
traefik traefik
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Traefik是Traefik开源的一款反向代理与负载均衡工具。 Traefik 2.11.46之前版本、3.6.17之前版本和3.7.1之前版本存在访问控制错误漏洞，该漏洞源于Kubernetes Gateway API提供者允许具有HTTPRoute创建权限的租户暴露REST提供者处理程序，可能导致低权限用户获取动态配置写入权限。

CVSS 6.4 · Medium EPSS 0.55% · P44

Affected Version Matrix 3

VendorProduct Version RangeStatus
traefik traefik < 2.11.46 affected
>= 3.0.0-beta1, < 3.6.17 affected
>= 3.7.0-rc.0, < 3.7.1 affected
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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: CVE Program / CVE List V5
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: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:H/SA:H
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Traefik 访问控制错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Traefik是Traefik开源的一款反向代理与负载均衡工具。 Traefik 2.11.46之前版本、3.6.17之前版本和3.7.1之前版本存在访问控制错误漏洞，该漏洞源于Kubernetes Gateway API提供者允许具有HTTPRoute创建权限的租户暴露REST提供者处理程序，可能导致低权限用户获取动态配置写入权限。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
traefik traefik < 2.11.46 -

II. Public POCs for CVE-2026-44774

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III. Intelligence Information for CVE-2026-44774

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Vendor Advisories for CVE-2026-44774 (1)

Vendor Pages for CVE-2026-44774 (3)

IV. Related Vulnerabilities

Same product: traefik
Same vendor: traefik
Same weakness: CWE-284

V. Comments for CVE-2026-44774

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