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CVE-2026-53714— Envoy Gateway: xDS Control Plane Information Disclosure when Envoy Gateway operates in GatewayNamespaceMode

Quick assessment

Affected
envoyproxy gateway
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.

Envoy Gateway 是一个用于将 Envoy Proxy 作为独立应用或基于 Kubernetes 的应用网关进行管理的开源项目。在 1.7.4 和 1.8.1 之前的版本中，当通过 配置 GatewayNamespaceMode 时，xDS gRPC 服务器安装了 JWT 流式拦截器（StreamInterceptor），但未安装一元拦截器（UnaryInterceptor），导致所有一元 Fetch RPC 请求均未经过身份验证。此外，流式拦截器仅对 消息进行身份验证；而在 State-of-the-W

CVSS 7.4 · High EPSS 0.03% · P8
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I. Basic Information for CVE-2026-53714

Vulnerability Information
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Vulnerability Title
Envoy Gateway: xDS Control Plane Information Disclosure when Envoy Gateway operates in GatewayNamespaceMode
Source: CVE Program / CVE List V5
Vulnerability Description
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, the xDS gRPC server in GatewayNamespaceMode, configured through provider.kubernetes.deploy.type=GatewayNamespace, installs a JWT StreamInterceptor but no UnaryInterceptor, leaving every unary Fetch RPC unauthenticated. The streaming interceptor also authenticates only discoveryv3.DeltaDiscoveryRequest messages; a discoveryv3.DiscoveryRequest used by the State-of-the-World protocol fails the type assertion and returns success without JWT validation. Any pod that can reach port 18000 can use the unauthenticated unary or State-of-the-World paths to retrieve TLS private keys through StreamSecrets, all xDS resources through StreamAggregatedResources, backend endpoints through StreamClusters or StreamEndpoints, and routing configuration through StreamRoutes or StreamListeners. This issue is fixed in versions 1.7.4 and 1.8.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
关键功能的认证机制缺失
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
envoyproxy gateway < 1.7.4 -

II. Public POCs for CVE-2026-53714

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III. Intelligence Information for CVE-2026-53714

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Patches & Fixes for CVE-2026-53714 (5)

Vendor Advisories for CVE-2026-53714 (1)

Vendor Pages for CVE-2026-53714 (2)

Other References for CVE-2026-53714 (1)

Same Patch Batch · envoyproxy · 2026-09-14 · 7 CVEs total

CVE-2026-53713 9.1 CRITICAL Envoy Gateway: Authentication Bypass via Improper Input Validation in EnvoyExtensionPolicy
CVE-2026-53716 6.5 MEDIUM Envoy Gateway: Wasm HTTP fetch decompresses gzip without output-size limit
CVE-2026-53719 6.5 MEDIUM Envoy Gateway: Nil-dereference when SecurityPolicy targets TCPRoute without spec.authoriza
CVE-2026-53717 6.5 MEDIUM Envoy Gateway: OCI layer extraction allocates make([]byte, h.Size) from untrusted tar head
CVE-2026-53718 6.4 MEDIUM Envoy Gateway custom backendRef cross-namespace ReferenceGrant bypass
CVE-2026-53715 5.3 MEDIUM Envoy Gateway: Wasm cache ServeHTTP reads mappingPath2Cache without lock

IV. Related Vulnerabilities

Same product: gateway
Same vendor: envoyproxy
Same weakness: CWE-306

V. Comments for CVE-2026-53714

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