Is CVE-2026-47220 actively exploited?

No active exploitation of CVE-2026-47220 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-47220 be exploited remotely?

Yes. CVE-2026-47220 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-47220?

CVE-2026-47220 has a CVSS score of 7.5 (HIGH).

HOME VULNERABILITIESCVE-2026-47220

HIGH

CVE-2026-47220

CWE-476Published: June 26, 2026· Updated: Jun 30, 2026

7.5

CVSS v3.1

EPSS:0.46%probability of exploitation in 30 daysPercentile:36.6th

Official Description

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.

NVD Source

Technical Analysis

CVE-2026-47220 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.