Envoy Gateway: xDS Control Plane Information Disclosure when Envoy Gateway operates in GatewayNamespaceMode
Key facts
- Attack vector
- Adjacent network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-306.
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, 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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| envoyproxy | gateway | before 1.7.4; 1.8.0-rc.0 to before 1.8.1 | 1.7.4, 1.8.1 | Patch available | CNA |
| — | github.com/envoyproxy/gateway (Go) | 1.8.0-rc.0 to before 1.8.1 | 1.8.1 | Patch available | GHSA-22xc-xg2r-9j7v |
| — | github.com/envoyproxy/gateway (Go) | before 1.7.4 | 1.7.4 | Patch available | GHSA-22xc-xg2r-9j7v |
- gateway Vendorenvoyproxy Affected before 1.7.4; 1.8.0-rc.0 to before 1.8.1 Fixed in 1.7.4, 1.8.1 Patch available CNA
- github.com/envoyproxy/gateway (Go) Vendor— Affected 1.8.0-rc.0 to before 1.8.1 Fixed in 1.8.1 Patch available GHSA-22xc-xg2r-9j7v
- github.com/envoyproxy/gateway (Go) Vendor— Affected before 1.7.4 Fixed in 1.7.4 Patch available GHSA-22xc-xg2r-9j7v
CPE names Threatist (inferred) · 1
Inferred from how NVD named this product before; not given by a source.
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:envoyproxy:gateway:*:*:*:*:*:*:*:* | — | — | envoyproxy |
- cpe:2.3:a:envoyproxy:gateway:*:*:*:*:*:*:*:* Versions — — ·envoyproxy
Remediation
- Fix · CNA gateway (envoyproxy) Fixed in 1.7.4, 1.8.1
- Fix · GHSA-22xc-xg2r-9j7v github.com/envoyproxy/gateway (Go) Fixed in 1.8.1 Advisory →
- Fix · GHSA-22xc-xg2r-9j7v github.com/envoyproxy/gateway (Go) Fixed in 1.7.4 Advisory →
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
Not affected: 1 product
- Red Hat Connectivity Link 1
Timeline
- 2026-10-02 Threatist record created from CVE-2026-53714
- 2026-10-03 Alias added: GHSA-22xc-xg2r-9j7v
References
Other 10
- https://github.com/envoyproxy/gateway/security/advisories/GHSA-22xc-xg2r-9j7v
- https://github.com/envoyproxy/gateway/pull/8986
- https://github.com/envoyproxy/gateway/pull/9116
- https://github.com/envoyproxy/gateway/pull/9118
- https://github.com/envoyproxy/gateway/commit/4df0809ff1ed59ffb09604da4084335b8c6647c5
- https://github.com/envoyproxy/gateway/commit/e9124abc4ff4b63a218a6890c1b28a982c850465
- https://github.com/envoyproxy/gateway/commit/f1f9829af2a231f0cae915c09800353c76622d97
- https://github.com/envoyproxy/gateway/releases/tag/v1.7.4
- https://github.com/envoyproxy/gateway/releases/tag/v1.8.1
- https://github.com/envoyproxy/gateway
More envoyproxy vulnerabilities
- TI-2026-79288 Out-of-bounds write in Google Brotli decoder KEVCVSS 4.0CRITICAL 9.2
- TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
- TI-2024-20001 HTTP/2: CPU exhaustion due to CONTINUATION frame flood CVSS 3.1HIGH 7.5
- TI-2024-18524 HTTP/2: memory exhaustion due to CONTINUATION frame flood CVSS 3.1HIGH 7.5
- TI-2023-12215 Envoy client may fake the header `x-envoy-original-path` CVSS 3.1CRITICAL 9.1
- TI-2023-18002 Envoy vulnerable to OAuth2 credentials exploit with permanent validity CVSS 3.1CRITICAL 9.8
Sources
- CVE-2026-53714 · CVE Program
- CVE-2026-53714 · NVD
- FIRST EPSS
- GHSA-22xc-xg2r-9j7v · GitHub Advisory Database · CC BY 4.0
- CVE-2026-53714 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences