CVE-2026-47692
Medium
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.
SeverityMedium
CVSS4.8
Exploit probability—
Product
Envoy
PublishedJun 26, 2026
First seenJun 26, 2026
Weakness typeCWE-130CWE-130
How to fix
Update
- envoyproxy envoy1.35.13, 1.36.9, 1.37.5, 1.38.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| envoyproxy envoy | 1.34.0 ≤ v < 1.35.13, 1.36.0 ≤ v < 1.36.9, 1.37.0 ≤ v < 1.37.5, 1.38.0 ≤ v < 1.38.3 | 1.35.13, 1.36.9, 1.37.5, 1.38.3 |
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