envoyproxy Envoy Gateway up to 1.7.3/1.8.0 Wasm HTTP Server httpserver.go HTTPServer.ServeHTTP denial of service

Summaryinfo

A vulnerability classified as critical has been found in envoyproxy Envoy Gateway up to 1.7.3/1.8.0. Affected by this issue is the function HTTPServer.ServeHTTP of the file internal/wasm/httpserver.go of the component Wasm HTTP Server. The manipulation leads to denial of service. This vulnerability is referenced as CVE-2026-53715. Remote exploitation of the attack is possible. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in envoyproxy Envoy Gateway up to 1.7.3/1.8.0 and classified as critical. This issue affects the function HTTPServer.ServeHTTP of the file internal/wasm/httpserver.go of the component Wasm HTTP Server. The manipulation with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. Impacted is availability. The summary by CVE is:

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.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-53715 since 06/10/2026. The exploitation is known to be easy. The attack may be initiated remotely. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

Upgrading to version 1.7.4 or 1.8.1 eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Firewall Software

Vendor

• envoyproxy

Name

• Envoy Gateway

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.7.0
• 1.7.1
• 1.7.2
• 1.7.3
• 1.8.0

License

• free

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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