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CVE-2026-47692

4.3 medium SSVC exploitation: none Analyzed
NVD · CVE.org

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.

Fix

Patch, vendor advisory and mitigation references on NVD 1

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 1

  1. First seenCVSS 4.3 · envoyproxyNVD modified 2026-10-25 17:10

Affected (CPE criteria) 1

  • cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*

References 1