VULNERABILITY INTELLIGENCE

CVE-2026-47692

CVSS score4.8 MEDIUM
EPSS probability0.22%
CISA KEVNot currently listed
Published2026-06-26
Last modified2026-10-25
CVSS vectorCVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:N/I:L/A:L

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.

Weakness classification

  • security-advisories@github.com: CWE-130

Primary references