Envoy Gateway: Wasm cache ServeHTTP reads mappingPath2Cache without lock

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-53715
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-14 21:17:12 UTC
Updated2026-09-15 15:17:17 UTC
DescriptionEnvoy 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.

Risk And Classification

Primary CVSS: v3.1 5.3 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.003570000 probability, percentile 0.291470000 (date 2026-09-15)

Problem Types: CWE-362 | CWE-362 CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.3MEDIUMCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
3.1CNADECLARED5.3MEDIUMCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Envoyproxy Gateway affected < 1.7.4 Not specified
CNA Envoyproxy Gateway affected >= 1.8.0-rc.0, < 1.8.1 Not specified

References

ReferenceSourceLinkTags
github.com/envoyproxy/gateway/security/advisories/GHSA-8fv2-88gg-hm7q [email protected] github.com
github.com/envoyproxy/gateway/releases/tag/v1.8.1 [email protected] github.com
github.com/envoyproxy/gateway/pull/9173 [email protected] github.com
github.com/envoyproxy/gateway/pull/9172 [email protected] github.com
github.com/envoyproxy/gateway/commit/b4737180c7e597490c6363075c565fa8cf2... [email protected] github.com
github.com/envoyproxy/gateway/releases/tag/v1.7.4 [email protected] github.com
github.com/envoyproxy/gateway/commit/96e2b750868a459ace4b8b68e6a6e4fb015... [email protected] github.com
github.com/envoyproxy/gateway/commit/5a78db82b7cf4fc5bebbeda2c5095289203... [email protected] github.com
github.com/envoyproxy/gateway/pull/9171 [email protected] github.com
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