CVE-2026-48044

Envoy is an open source edge and service proxy designed for cloud-native applications. From 1.23.0 until 1.35.11, 1.36.7, 1.37.3, and 1.38.1, a vulnerability has been identified in Envoy's zstd decompressor implementation (ZstdDecompressorImpl). When zstd decompression is enabled, processing a specially crafted, highly compressed zstd payload can lead to massive memory allocation. An attacker can exploit this to cause severe memory exhaustion, potentially resulting in an Out-Of-Memory (OOM) kill and Denial of Service (DoS) for the Envoy proxy. This vulnerability is fixed in 1.35.11, 1.36.7, 1.37.3, and 1.38.1.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/envoyproxy/envoy/security/advisories/GHSA-m3p9-47wh-88wg	Mitigation Vendor Advisory Exploit

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:envoyproxy:envoy::::::::
	cpe:2.3:a:envoyproxy:envoy::::::::
	cpe:2.3:a:envoyproxy:envoy::::::::
	cpe:2.3:a:envoyproxy:envoy::::::::

History

29 Jun 2026, 18:40

Type	Values Removed	Values Added
CPE		cpe:2.3:a:envoyproxy:envoy::::::::
References	~~() https://github.com/envoyproxy/envoy/security/advisories/GHSA-m3p9-47wh-88wg -~~	() https://github.com/envoyproxy/envoy/security/advisories/GHSA-m3p9-47wh-88wg - Mitigation, Vendor Advisory, Exploit
First Time		Envoyproxy envoy Envoyproxy

26 Jun 2026, 18:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-26 18:16

Updated : 2026-06-29 18:40

NVD link : CVE-2026-48044

Mitre link : CVE-2026-48044

CVE.ORG link : CVE-2026-48044

JSON object : View

Products Affected

envoyproxy

envoy

CWE

CWE-409

Improper Handling of Highly Compressed Data (Data Amplification)

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