Denial of Service Vulnerability in Envoy Proxy by Envoy Proxy
CVE-2026-48044

7.5HIGH

Key Information:

Vendor

Envoyproxy

Status
Envoy
Vendor
CVE Published:
26 June 2026

What is CVE-2026-48044?

A vulnerability has been identified in the zstd decompressor implementation of Envoy Proxy that can lead to significant memory allocation when processing specially crafted zstd payloads. By exploiting this vulnerability, an attacker can trigger severe memory exhaustion, resulting in an Out-Of-Memory (OOM) termination of the Envoy proxy, thereby causing Denial of Service (DoS). The issue has been addressed in versions 1.35.11, 1.36.7, 1.37.3, and 1.38.1.

Affected Version(s)

envoy >= 1.38.0, < 1.38.1 < 1.38.0, 1.38.1

envoy >= 1.37.0, < 1.37.3 < 1.37.0, 1.37.3

envoy >= 1.36.0, < 1.36.7 < 1.36.0, 1.36.7

References

https://github.com/envoyproxy/envoy/security/advisories/G...
x_refsource_CONFIRM

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.