CVE-2026-47207

Envoy is an open source edge and service proxy designed for cloud-native applications. From 1.34.0 until 1.35.13, 1.36.9, 1.37.5, and 1.38.3, Envoy crashes if an ext_proc server sends a single gRPC message containing multiple, specially crafted ProcessingResponse messages. This can occur when the first response in the batch causes the gRPC stream object to be destroyed, leading to a use-after-free error when Envoy attempts to process subsequent responses in the same gRPC message. This vulnerability is fixed in 1.35.13, 1.36.9, 1.37.5, and 1.38.3.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/envoyproxy/envoy/security/advisories/GHSA-68cv-hq5f-g6xv	Exploit Vendor Advisory
https://github.com/envoyproxy/envoy/security/advisories/GHSA-68cv-hq5f-g6xv	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:envoyproxy:envoy::::::::
	cpe:2.3:a:envoyproxy:envoy::::::::
	cpe:2.3:a:envoyproxy:envoy::::::::
	cpe:2.3:a:envoyproxy:envoy::::::::

History

25 Oct 2026, 17:10

Type	Values Removed	Values Added
Summary		(es) Envoy es un proxy de borde y de servicio de código abierto diseñado para aplicaciones nativas de la nube. Desde la versión 1.34.0 hasta la 1.35.13, la 1.36.9, la 1.37.5 y la 1.38.3, Envoy falla si un servidor ext_proc envía un único mensaje gRPC que contiene múltiples mensajes ProcessingResponse especialmente diseñados. Esto puede ocurrir cuando la primera respuesta en el lote provoca la destrucción del objeto de flujo gRPC, lo que lleva a un error de uso después de liberación cuando Envoy intenta procesar respuestas posteriores en el mismo mensaje gRPC. Esta vulnerabilidad se corrige en la versión 1.35.13, la 1.36.9, la 1.37.5 y la 1.38.3.

Information

Published : 2026-06-26 18:16

Updated : 2026-10-25 17:10

NVD link : CVE-2026-47207

Mitre link : CVE-2026-47207

CVE.ORG link : CVE-2026-47207

JSON object : View

Products Affected

envoyproxy

envoy

CWE

CWE-416

Use After Free

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