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CVE-2026-47692

Envoy: PROXY Protocol v2 header generator emits "skipped" TLVs, causing 65 KB attacker-controlled spillover into the upstream application stream PUBLISHED

Description (CNA)

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 (CNA)

Vendor / productVersions
envoyproxy / envoyaffected >= 1.38.0, < 1.38.3; affected >= 1.37.0, < 1.37.5; affected >= 1.36.0, < 1.36.9; affected >= 1.34.0, < 1.35.13

CWE

CWE-130

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.