CVE-2026-47204: Envoyproxy Envoy

High severity, CVSS 7.5. EPSS: 0.4% chance of exploitation in the next 30 days.

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.

Affected products

• Envoyproxy Envoy: from 1.26.0, before 1.35.13 (fixed in 1.35.13); from 1.36.0, before 1.36.9 (fixed in 1.36.9); from 1.37.0, before 1.37.5 (fixed in 1.37.5); from 1.38.0, before 1.38.3 (fixed in 1.38.3)

Published 2026-06-26. Last modified 2026-06-29.