high7.5
CVE-2026-47220
Envoy is an open source edge and service proxy designed for cloud-native applications.
Impact
Envoy is an open source edge and service proxy designed for cloud-native applications. From 1.37.0 until 1.37.5 and 1.38.3, when the %REQUESTED_SERVER_NAME(X:Y)% is used in log format and host related options is specified, like HOST_FIRST, SNI_FIRST, it's possible to crash Envoy when the specified host header is missing in the request headers. This vulnerability is fixed in 1.37.5 and 1.38.3.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Envoyproxy | Envoy | from 1.37.0 before 1.37.5 from 1.38.0 before 1.38.3 |