bit-envoy-gateway-2026-53718

bitnami_vulndb

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, an HTTPRoute can use an extension-managed custom backendRef to reference a backend resource in another namespace without a matching Gateway API ReferenceGrant in the target namespace. The custom-backend branch in internal/gatewayapi/route.go omits validateBackendNamespace, allowing the route-owning namespace to bind to and use the resource without the backend namespace owner's consent and violating the Gateway API cross-namespace authorization model. This issue is fixed in versions 1.7.4 and 1.8.1.

Timeline

Published: unknown
Last Modified: unknown

CVSS Details

CVSS details not available.

Affected Products

No product information available.

References

Linked Vulnerabilities

No linked vulnerabilities found.

{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "envoy-gateway",
        "purl": "pkg:bitnami/envoy-gateway"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.7.4"
            },
            {
              "introduced": "1.8.0"
            },
            {
              "fixed": "1.8.1"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:L",
          "type": "CVSS_V3"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-53718"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:envoyproxy:gateway:*:*:*:*:*:go:*:*"
    ],
    "severity": "Medium"
  },
  "details": "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, an HTTPRoute can use an extension-managed custom backendRef to reference a backend resource in another namespace without a matching Gateway API ReferenceGrant in the target namespace. The custom-backend branch in internal/gatewayapi/route.go omits validateBackendNamespace, allowing the route-owning namespace to bind to and use the resource without the backend namespace owner's consent and violating the Gateway API cross-namespace authorization model. This issue is fixed in versions 1.7.4 and 1.8.1.",
  "id": "BIT-envoy-gateway-2026-53718",
  "modified": "2026-09-21T09:26:48.669Z",
  "published": "2026-09-21T08:54:59.902Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/envoyproxy/gateway/commit/5a78db82b7cf4fc5bebbeda2c50952892038a464"
    },
    {
      "type": "WEB",
      "url": "https://github.com/envoyproxy/gateway/commit/96e2b750868a459ace4b8b68e6a6e4fb0152b9b7"
    },
    {
      "type": "WEB",
      "url": "https://github.com/envoyproxy/gateway/commit/b4737180c7e597490c6363075c565fa8cf24eead"
    },
    {
      "type": "WEB",
      "url": "https://github.com/envoyproxy/gateway/pull/9171"
    },
    {
      "type": "WEB",
      "url": "https://github.com/envoyproxy/gateway/pull/9172"
    },
    {
      "type": "WEB",
      "url": "https://github.com/envoyproxy/gateway/pull/9173"
    },
    {
      "type": "WEB",
      "url": "https://github.com/envoyproxy/gateway/releases/tag/v1.7.4"
    },
    {
      "type": "WEB",
      "url": "https://github.com/envoyproxy/gateway/releases/tag/v1.8.1"
    },
    {
      "type": "WEB",
      "url": "https://github.com/envoyproxy/gateway/security/advisories/GHSA-fcrp-7gc2-93g7"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53718"
    }
  ],
  "schema_version": "1.6.2",
  "summary": "Envoy Gateway custom backendRef cross-namespace ReferenceGrant bypass"
}

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