CVE-2026-47692

mediumCVSS 4.8covered by 1 sourcefirst seen 2026-06-26

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.

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Exploitation outlook

Low exploitation risk0.22% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 12% of all EPSS-scored CVEs.

Advisory coverage (1)

mediumCVE-2026-47692: Envoy is an open source edge and service proxy designed for cloud-native applications. From 1.…nvd · 2026-06-26

External references

NVD record for CVE-2026-47692

CVE.org record

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