---
id: CVE-2026-53717
title: >-
  Envoy Gateway is an open source project for managing Envoy Proxy as a
  standalone or Kubernetes-based application gateway
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,
  internal/wasm/imagefetcher.go follows tenant-controlled EnvoyExtensionPolicy
  spec.wasm[].…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-789
vendor: envoyproxy
product: gateway
affected:
  - gateway < 1.7.4
  - 'gateway >= 1.8.0-rc.0, < 1.8.1'
patched:
  - github.com/envoyproxy/gateway 1.8.1
  - github.com/envoyproxy/gateway 1.7.4
published: '2026-09-14'
updated: '2026-09-15'
sourceUpdated: '2026-09-15T20:17:18.793'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-53717'
references:
  - url: >-
      https://github.com/envoyproxy/gateway/commit/5a78db82b7cf4fc5bebbeda2c50952892038a464
    label: security-advisories@github.com
  - url: >-
      https://github.com/envoyproxy/gateway/commit/96e2b750868a459ace4b8b68e6a6e4fb0152b9b7
    label: security-advisories@github.com
  - url: >-
      https://github.com/envoyproxy/gateway/commit/b4737180c7e597490c6363075c565fa8cf24eead
    label: security-advisories@github.com
  - url: 'https://github.com/envoyproxy/gateway/pull/9171'
    label: security-advisories@github.com
  - url: 'https://github.com/envoyproxy/gateway/pull/9172'
    label: security-advisories@github.com
  - url: 'https://github.com/envoyproxy/gateway/pull/9173'
    label: security-advisories@github.com
  - url: 'https://github.com/envoyproxy/gateway/releases/tag/v1.7.4'
    label: security-advisories@github.com
  - url: 'https://github.com/envoyproxy/gateway/releases/tag/v1.8.1'
    label: security-advisories@github.com
  - url: >-
      https://github.com/envoyproxy/gateway/security/advisories/GHSA-h7pq-86h8-rp5x
    label: security-advisories@github.com
  - url: 'https://github.com/advisories/GHSA-h7pq-86h8-rp5x'
  - url: 'https://github.com/envoyproxy/gateway'
tags:
  - nvd
  - cve.org
  - ghsa
  - go
  - osv
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-15T19:29:49.750607Z'
epss: 0.00715
epssPercentile: 0.51718
aliases:
  - GHSA-h7pq-86h8-rp5x
  - BIT-envoy-gateway-2026-53717
  - GO-2026-6008
ecosystem: go
ingestedAt: '2026-07-16T19:57:16.722Z'
---

## Overview

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, internal/wasm/imagefetcher.go follows tenant-controlled EnvoyExtensionPolicy spec.wasm[].code.image.url values to Docker or OCI Wasm layers, and extractWasmPluginBinary uses the untrusted tar-header h.Size value to allocate memory before validating the entry name or declared size. A small PAX or GNU tar header can therefore claim a multi-terabyte entry even though the surrounding LimitReader restricts only the bytes read from the stream, and no registry allowlist prevents a permitted tenant from selecting an attacker-controlled registry that the controller can reach. The allocation is attempted for every tar entry and can cause an unrecoverable Go runtime out-of-memory failure; because the custom resource persists, reconciliation repeatedly crash-loops the shared controller and causes a single-request, non-volumetric, cluster-wide control-plane denial of service. This issue is fixed in versions 1.7.4 and 1.8.1.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-53717)

Affected packages:

- `github.com/envoyproxy/gateway >= 1.8.0-rc.0, < 1.8.1`
- `github.com/envoyproxy/gateway < 1.7.4`

Patched in:

- `github.com/envoyproxy/gateway 1.8.1`
- `github.com/envoyproxy/gateway 1.7.4`

Source: https://github.com/advisories/GHSA-h7pq-86h8-rp5x