CVE-2026-47204 PUBLISHED

Envoy: grpc_stats filter segfault on Connect protocol requests to direct_response routes

Assigner: GitHub_M
Reserved: 18.05.2026 Published: 26.06.2026 Updated: 26.06.2026

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.

Metrics

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS Score: 6.5

Product Status

Vendor envoyproxy
Product envoy
Versions
  • Version >= 1.38.0, < 1.38.3 is affected
  • Version >= 1.37.0, < 1.37.5 is affected
  • Version >= 1.36.0, < 1.36.9 is affected
  • Version >= 1.26.0, < 1.35.13 is affected

References

Problem Types

  • CWE-476: NULL Pointer Dereference CWE