CVE-2026-54765— Traefik: Gateway HTTPRoute backendRef filters can leak backend context across routes sharing a Service:port

Traefik: Gateway HTTPRoute backendRef filters can leak backend context across routes sharing a Service:port

Traefik is an open source HTTP reverse proxy and load balancer. From v3.7.0 prior to v3.7.6, Traefik's Kubernetes Gateway API provider may resolve two accepted HTTPRoutes that target the same backend Service:port but configure different backendRef filters to the same child service and apply only one route's filter set to all requests reaching that backend. In Gateway deployments where backendRef filters set security-sensitive headers, such as tenant identity, authorization context, or values the backend trusts, an attacker who can create an accepted HTTPRoute sharing the same backend Service:port may cause their route's filter context to be applied to another route's requests, potentially crossing namespace boundaries when a ReferenceGrant permits cross-namespace targeting. This issue is fixed in version v3.7.6.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:H/SA:N

访问控制不恰当

Traefik 权限许可和访问控制问题漏洞

Traefik是Traefik公司开源的一款反向代理与负载均衡工具。 Traefik 3.7.0版本至3.7.6之前版本存在安全漏洞，该漏洞源于Kubernetes Gateway API提供程序在处理指向同一后端Service:port的HTTPRoutes时，可能错误应用backendRef过滤器，导致安全敏感的标头（如租户身份、授权上下文等）被错误应用到其他路由的请求，可能允许攻击者通过创建共享相同后端Service:port的HTTPRoute，使其过滤器上下文应用于其他路由的请求，进而可能跨越命

N/A

N/A