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6.5 Medium

CVE-2026-53716 Envoy Gateway is an open source project for managing Envoy Proxy as a standalone or Kubernetes-based application gateway

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, getFileFromGZ in internal/wasm/httpfetcher.go calls io.ReadAll on a gzip.Reader without limiting decompressed output when a tenant-controlled EnvoyExtensionPolicy.spec.wasm[].code.http.url points to a reachable compressed Wasm payload. The 256 MiB compressed-input cap does not constrain the expanded size, no operator Wasm URL allowlist exists, and the optional sha256 check occurs only after decompression, so a comparatively small gzip stream can force a multi-gigabyte allocation in the shared controller. The resulting out-of-memory termination restarts the controller, re-reconciles the persistent custom resource, and can create a persistent cross-tenant control-plane outage. This issue is fixed in versions 1.7.4 and 1.8.1.

Affected products and versions

Product Affected versions Fixed in
gateway 1.8 1.8.0-rc.0 → < 1.8.1 1.8.1
gateway 1.7 earliest → < 1.7.4 1.7.4

References

Timeline

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Other CVEs of gateway

The 10 CVEs of gateway →
CVE-2026-53714 Envoy Gateway is an open source project for managing Envoy Proxy as a standalone or Kubernetes-based application gateway 7.4 High CVE-2026-53715 Envoy Gateway is an open source project for managing Envoy Proxy as a standalone or Kubernetes-based application gateway 5.3 Medium CVE-2026-53719 Envoy Gateway is an open source project for managing Envoy Proxy as a standalone or Kubernetes-based application gateway 6.5 Medium CVE-2026-53718 Envoy Gateway is an open source project for managing Envoy Proxy as a standalone or Kubernetes-based application gateway 6.4 Medium
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