CVE-2026-47220

highCVSS 7.5covered by 1 sourcefirst seen 2026-06-26

Envoy is an open source edge and service proxy designed for cloud-native applications. From 1.37.0 until 1.37.5 and 1.38.3, when the %REQUESTED_SERVER_NAME(X:Y)% is used in log format and host related options is specified, like HOST_FIRST, SNI_FIRST, it's possible to crash Envoy when the specified host header is missing in the request headers. This vulnerability is fixed in 1.37.5 and 1.38.3.

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Exploitation outlook

Low exploitation risk0.66% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 47% of all EPSS-scored CVEs.

Advisory coverage (1)

highCVE-2026-47220: 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-2026-47220

CVE.org record

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