CVE-2026-47692

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, PROXY Protocol v2 header generator emits TLVs beyond the maximum length of 65535 bytes, causing a mismatch between bytes written and the length field in the header. This can result in smuggled bytes on the upstream request. This vulnerability is fixed in 1.35.13, 1.36.9, 1.37.5, and 1.38.3.

CVSS v3 4.8 MEDIUM

4.8^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.7 / Impact : 2.7

Attack Vector ADJACENT_NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact LOW

Scope CHANGED

References

Link	Resource
https://github.com/envoyproxy/envoy/security/advisories/GHSA-wh36-hm39-mm3r	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, 20:09

Type	Values Removed	Values Added
References	~~() https://github.com/envoyproxy/envoy/security/advisories/GHSA-wh36-hm39-mm3r -~~	() https://github.com/envoyproxy/envoy/security/advisories/GHSA-wh36-hm39-mm3r - Vendor Advisory
First Time		Envoyproxy envoy Envoyproxy
CPE		cpe:2.3:a:envoyproxy:envoy::::::::

26 Jun 2026, 18:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-26 18:16

Updated : 2026-06-27 20:09

NVD link : CVE-2026-47692

Mitre link : CVE-2026-47692

CVE.ORG link : CVE-2026-47692

JSON object : View

Products Affected

envoyproxy

envoy

CWE

CWE-130

Improper Handling of Length Parameter Inconsistency

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