Описание
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.
A flaw was found in Traefik. A low-privileged tenant with HTTPRoute creation permissions in Traefik's Kubernetes Gateway API provider can bypass security settings. This allows the tenant to expose the REST provider handler and gain live dynamic configuration write access to Traefik. This vulnerability enables unauthorized reconfiguration of routers and services, potentially leading to privilege escalation within the system.
Отчет
Red Hat's CVSS 3.1 score (8.3, AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H) matches the CVSS 3.1 vector independently published by the reporting CNA (GitHub Security Advisories, GHSA-96qj-4jj5-wcjc), which also assesses Scope:Unchanged with Confidentiality:Low. The CNA's own CVSS 4.0 base score for this issue is 6.4 (Medium): 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. NIST's CVSS 3.1 score of 9.9 (Scope:Changed, Confidentiality:High) is a National Vulnerability Database enrichment re-derivation and is not the score assigned by the reporting CNA. Exploitation requires an actor who already holds HTTPRoute create/update permission within an allowed tenant namespace of a shared Traefik Gateway API deployment (reflected in PR:L, not an anonymous or unauthenticated attacker), and additionally requires the REST provider to be enabled on that Traefik instance. The vulnerable component (Traefik's own dynamic configuration and routing control plane) and the impacted component (that same Traefik instance's routers and services) are one and the same, so Red Hat assesses Scope:Unchanged as the correct metric, consistent with the CNA's own re-scored vector rather than NIST's enrichment score.
Меры по смягчению последствий
Upgrade Traefik to version 2.11.46 or later (2.x line), 3.6.17 or later (3.6.x line), or 3.7.1 or later (3.7.x line) by installing updated Red Hat OpenShift Dev Spaces releases that ship a fixed traefik-rhel9 container image. Until updated images are available, limit which principals can create HTTPRoute resources in namespaces where Traefik runs with the Kubernetes Gateway API provider. Disable or tightly restrict the Traefik REST dynamic configuration provider in shared Gateway deployments, and block untrusted use of TraefikService backends that reference @internal handlers.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat OpenShift GitOps | openshift-gitops-1/argo-rollouts-rhel8 | Not affected | ||
| Red Hat OpenShift GitOps | openshift-gitops-1/argo-rollouts-rhel9 | Not affected | ||
| Red Hat OpenShift Dev Spaces 3.29 | devspaces/traefik-rhel9 | Fixed | RHSA-2026:36820 | 08.07.2026 |
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Дополнительная информация
Статус:
EPSS
8.3 High
CVSS3
Связанные уязвимости
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.
Traefik is an HTTP reverse proxy and load balancer. Prior to 2.11.46, ...
Traefik: Gateway API TraefikService backend accepts rest@internal, allowing unauthorized exposure of the REST provider despite providers.rest.insecure=false
ALT-PU-2026-8219: package `traefik` update to version 3.6.17-alt1
EPSS
8.3 High
CVSS3