CVE-2026-53718 (GCVE-0-2026-53718)
Vulnerability from cvelistv5
Published
2026-09-14 20:12
Modified
2026-09-15 13:55
Severity ?
6.4 (Medium) - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:L
CWE
Summary
Envoy Gateway is an open source project for managing Envoy Proxy as a standalone or Kubernetes-based application gateway. Prior to 1.7.4 and 1.8.1, an HTTPRoute can use an extension-managed custom backendRef to reference a backend resource in another namespace without a matching Gateway API ReferenceGrant in the target namespace. The custom-backend branch in internal/gatewayapi/route.go omits validateBackendNamespace, allowing the route-owning namespace to bind to and use the resource without the backend namespace owner's consent and violating the Gateway API cross-namespace authorization model. This issue is fixed in versions 1.7.4 and 1.8.1.
References
Impacted products
Vendor Product Version
envoyproxy gateway Version: < 1.7.4
Version: >= 1.8.0-rc.0, < 1.8.1
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