CVE-2026-47204
Envoy: grpc_stats filter segfault on Connect protocol requests to direct_response routes
7.5
HIGH
CVSS 3.1
EPSS 0.45%
Description
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.
How to fix CVE-2026-47204
To remediate CVE-2026-47204, upgrade the affected package to a fixed version below.
- —upgrade to 1.35.13 or later
Is CVE-2026-47204 being exploited?
Low — EPSS is 0.4%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- >= 1.26.0, < 1.35.13, >= 1.36.0, < 1.36.9, >= 1.37.0, < 1.37.5, >= 1.38.0, < 1.38.3
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |