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

{
    "lastseen": "",
    "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.",
    "published": "2026-05-15T16:30:43.265Z",
    "modified": "2026-05-15T16:30:43.265Z",
    "type": "cve",
    "title": "Traefik: Gateway API TraefikService backend accepts rest@internal, allowing unauthorized exposure of the REST provider despite providers.rest.insecure=false",
    "source": "GitHub_M",
    "references": "https://github.com/traefik/traefik/security/advisories/GHSA-96qj-4jj5-wcjc\nhttps://github.com/traefik/traefik/releases/tag/v2.11.46\nhttps://github.com/traefik/traefik/releases/tag/v3.6.17\nhttps://github.com/traefik/traefik/releases/tag/v3.7.1",
    "id": "CVE-2026-44774",
    "bulletinFamily": "",
    "cwe": [
        "CWE-284"
    ],
    "cvelist": null,
    "sourceData": "traefik traefik < 2.11.46\ntraefik traefik >= 3.0.0-beta1, < 3.6.17\ntraefik traefik >= 3.7.0-rc.0, < 3.7.1",
    "sourceHref": "",
    "cvss": {
        "score": 6.4,
        "severity": "MEDIUM",
        "vector": "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",
        "version": "4.0"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
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        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "traefik",
    "version": "< 2.11.46",
    "vendor": "traefik",
    "ai_description": "",
    "ai_severity": "",
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    "ai_score": 0
}