What is CVE-2026-47220?

CVE-2026-47220 is a high-severity vulnerability in Envoyproxy Envoy, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2026-06-26.

How severe is CVE-2026-47220?

High severity. CVSS v3 base score is 7.5 out of 10.

NULL pointer dereference in Envoyproxy Envoy

CVE-2026-47220

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…

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Envoyproxy Envoy — versions >= 1.38.0, < 1.38.3, >= 1.37.0, < 1.37.5

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-47220?: CVE-2026-47220 is a high-severity vulnerability in Envoyproxy Envoy, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2026-06-26.
How severe is CVE-2026-47220?: High severity. CVSS v3 base score is 7.5 out of 10.