Envoy: grpc_stats filter segfault on Connect protocol requests to direct_response routes_CVE-2026-47204

{
    "lastseen": "",
    "description": "Envoy is an open source edge and service proxy designed for cloud-native applications. From 1.26.0 until 1.35.13, 1.36.9, 1.37.5, and 1.38.3, the envoy.filters.http.grpc_stats filter crashes (null pointer dereference / segfault) when a Connect protocol request (Content-Type: application/connect+proto or application/connect+json) hits a direct_response route. A single unauthenticated HTTP request crashes the Envoy process. This vulnerability is fixed in 1.35.13, 1.36.9, 1.37.5, and 1.38.3.",
    "published": "2026-06-26T17:37:17.376Z",
    "modified": "2026-06-26T17:37:17.376Z",
    "type": "cve",
    "title": "Envoy: grpc_stats filter segfault on Connect protocol requests to direct_response routes",
    "source": "GitHub_M",
    "references": "https://github.com/envoyproxy/envoy/security/advisories/GHSA-3jxh-8p6x-7pf6",
    "id": "CVE-2026-47204",
    "bulletinFamily": "",
    "cwe": [
        "CWE-476"
    ],
    "cvelist": null,
    "sourceData": "envoyproxy envoy >= 1.38.0, < 1.38.3\nenvoyproxy envoy >= 1.37.0, < 1.37.5\nenvoyproxy envoy >= 1.36.0, < 1.36.9\nenvoyproxy envoy >= 1.26.0, < 1.35.13",
    "sourceHref": "",
    "cvss": {
        "score": 6.5,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
        "version": "3.1"
    },
    "cvss2": [],
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        "baseScore": 0,
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        "confidentialityImpact": "",
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        "availabilityImpact": "",
        "cvssV3": {
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    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "envoy",
    "version": ">= 1.38.0, < 1.38.3",
    "vendor": "envoyproxy",
    "ai_description": "",
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    "ai_score": 0
}