# CVE-2026-53715

## Summary

- **CVE ID:** CVE-2026-53715
- **Severity:** MEDIUM
- **CVSS Score:** 5.3 (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H)
- **CWE:** CWE-362
- **Published:** Sep 14, 2026
- **Last Modified:** Sep 15, 2026

## 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, HTTPServer.ServeHTTP in internal/wasm/httpserver.go reads the plain mappingPath2Cache map without synchronization while HTTPServer.Get writes the same map during EnvoyExtensionPolicy translation. An attacker with pod-network access to unauthenticated port 18002 and tenant permission to churn policies with distinct Wasm URLs can flood GET requests until a per-request reader overlaps a writer. Go's concurrent map read and write detection invokes runtime.throw, which the net/http connection recovery cannot catch, terminating the controller process and causing a timing-dependent, cross-tenant control-plane denial of service until Kubernetes restarts the pod. This issue is fixed in versions 1.7.4 and 1.8.1.

## Affected Products

- envoyproxy — gateway (< 1.7.4)
- envoyproxy — gateway (>= 1.8.0-rc.0, < 1.8.1)

## References

- [CNA](https://github.com/envoyproxy/gateway/security/advisories/GHSA-8fv2-88gg-hm7q)
- [CNA](https://github.com/envoyproxy/gateway/pull/9171)
- [CNA](https://github.com/envoyproxy/gateway/pull/9172)
- [CNA](https://github.com/envoyproxy/gateway/pull/9173)
- [CNA](https://github.com/envoyproxy/gateway/commit/5a78db82b7cf4fc5bebbeda2c50952892038a464)
- [CNA](https://github.com/envoyproxy/gateway/commit/96e2b750868a459ace4b8b68e6a6e4fb0152b9b7)
- [CNA](https://github.com/envoyproxy/gateway/commit/b4737180c7e597490c6363075c565fa8cf24eead)
- [CNA](https://github.com/envoyproxy/gateway/releases/tag/v1.7.4)
- [CNA](https://github.com/envoyproxy/gateway/releases/tag/v1.8.1)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.36%
- **EPSS Percentile:** 29.3

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-17._