CVE-2026-47204
Envoy: grpc_stats filter segfault on Connect protocol requests to direct_response routes
CVSS Score
6.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-476 |
| Vendor | envoyproxy |
| Product | envoy |
| Published | Jun 26, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
envoyproxy / envoy
>= 1.38.0, < 1.38.3 >= 1.37.0, < 1.37.5 >= 1.36.0, < 1.36.9 >= 1.26.0, < 1.35.13