Medium severity4.8NVD Advisory· Published Jun 26, 2026· Updated Jun 27, 2026
CVE-2026-47692
CVE-2026-47692
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.
Affected products
5(expand)+ 2 more
- (no CPE)
- cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*range: >=1.34.0,<1.35.13
- (no CPE)range: 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
- osv-coords2 versions
>= 1.34.0, < 1.35.13+ 1 more
- (no CPE)range: >= 1.34.0, < 1.35.13
- (no CPE)range: < 1.30.2-1.1
Patches
Vulnerability mechanics
References
1- github.com/envoyproxy/envoy/security/advisories/GHSA-wh36-hm39-mm3rnvdVendor Advisory
News mentions
1- Envoy Proxy: Eleven Vulnerabilities Disclosed Together, Targeting DoS and Memory CorruptionVypr Intelligence · Jun 26, 2026