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.grpcstats filter crashes (null pointer dereference / segfault) when a Connect protocol request (Content-Type: application/connect+proto or application/connect+json) hits a directresponse 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.
{
"cwe_ids": [
"CWE-476"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/47xxx/CVE-2026-47204.json",
"cna_assigner": "GitHub_M"
}{
"cpe": "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*",
"extracted_events": [
{
"introduced": "1.26.0"
},
{
"fixed": "1.35.13"
},
{
"introduced": "1.36.0"
},
{
"fixed": "1.36.9"
},
{
"introduced": "1.37.0"
},
{
"fixed": "1.37.5"
},
{
"introduced": "1.38.0"
},
{
"fixed": "1.38.3"
}
],
"source": "CPE_RANGE"
}