CVE-2026-47220 | Envoy is an open source edge and service proxy designed for … | CVSS 7.5 HIGH

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.

Metadata

CVE ID: CVE-2026-47220
State: PUBLISHED
Assigner: GitHub_M
Reserved: 2026-05-18 22:25 UTC
Published: 2026-06-26 18:02 UTC
Last updated: 2026-06-26 18:02 UTC
Primary CWE: CWE-476
CWE-476: NULL Pointer Dereference
Vendor / Product: envoyproxy / envoy
Sources: cve.org · NVD

Severity & Metrics

7.5 HIGH CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products (1)

Vendor	Product	Platform	Versions
envoyproxy	envoy	—	>= 1.38.0, < 1.38.3, >= 1.37.0, < 1.37.5

Weakness (CWE)

CWE	Source	Description
CWE-476	cna	CWE-476: NULL Pointer Dereference

CVSS scores (1)

Score	Severity	Version	Source	Vector
7.5	HIGH	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References (1)

https://github.com/envoyproxy/envoy/security/advisories/GHSA-j9wh-4qfm-wf2v https://github.com/envoyproxy/envoy/security/advisories/GHSA-j9wh-4qfm-wf2v