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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.

PUBLISHED Reserved 2026-05-18 | Published 2026-06-26 | Updated 2026-06-26 | Assigner GitHub_M




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

Problem types

CWE-476: NULL Pointer Dereference

Product status

>= 1.38.0, < 1.38.3
affected

>= 1.37.0, < 1.37.5
affected

>= 1.36.0, < 1.36.9
affected

>= 1.26.0, < 1.35.13
affected

References

github.com/.../envoy/security/advisories/GHSA-3jxh-8p6x-7pf6

cve.org (CVE-2026-47204)

nvd.nist.gov (CVE-2026-47204)

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