CVE-2026-47692 - Vulnerability Details - OpenCVE

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.

No CVSS v4.0

Attack Vector Adjacent Network

Attack Complexity Low

Privileges Required High

Scope Changed

Confidentiality Impact None

Integrity Impact Low

Availability Impact Low

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Key SSVC decision points have not yet been added.

No data.

No data.

No data.

References

Link	Providers
https://github.com/envoyproxy/envoy/security/advisories/GHSA-wh36-hm39-mm3r

History

Fri, 26 Jun 2026 19:30:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Fri, 26 Jun 2026 18:15:00 +0000

Type	Values Removed	Values Added
Description		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.
Title		Envoy: PROXY Protocol v2 header generator emits "skipped" TLVs, causing 65 KB attacker-controlled spillover into the upstream application stream
Weaknesses		CWE-130
References		https://github.com/envoyproxy/envoy/security/advisories/GHSA-wh36-hm39-mm3r
Metrics		cvssV3_1 `{'score': 4.8, 'vector': 'CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:N/I:L/A:L'}`

MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-06-26T17:59:38.922Z

Updated: 2026-06-26T19:07:49.683Z

Reserved: 2026-05-19T21:18:20.403Z

Link: CVE-2026-47692

Vulnrichment

Updated: 2026-06-26T19:07:35.786Z

NVD

No data.

Redhat

No data.

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