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

27 Jun 2026, 20:20

Type	Values Removed	Values Added
First Time		Envoyproxy envoy Envoyproxy
CPE		cpe:2.3:a:envoyproxy:envoy::::::::
References	~~() https://github.com/envoyproxy/envoy/security/advisories/GHSA-68cv-hq5f-g6xv -~~	() https://github.com/envoyproxy/envoy/security/advisories/GHSA-68cv-hq5f-g6xv - Exploit, Vendor Advisory

26 Jun 2026, 19:16

Type	Values Removed	Values Added
References	~~() https://github.com/envoyproxy/envoy/security/advisories/GHSA-68cv-hq5f-g6xv -~~	() https://github.com/envoyproxy/envoy/security/advisories/GHSA-68cv-hq5f-g6xv -

26 Jun 2026, 18:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-26 18:16

Updated : 2026-06-27 20:20

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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