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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
  • Envoyproxy/Envoy3 versions
    cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*+ 2 more
    • 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
    • (no CPE)
  • osv-coords2 versions
    pkg:bitnami/envoypkg:rpm/opensuse/istioctl&distro=openSUSE%20Tumbleweed
    >= 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

News mentions

1