---
id: CVE-2024-34364
title: >-
  Envoy OOM vector from HTTP async client with unbounded response buffer for
  mirror response
summary: >-
  Envoy is a cloud-native, open source edge and service proxy. Envoy exposed an
  out-of-memory (OOM) vector from the mirror response, since async HTTP client
  will buffer the response with an unbounded buffer.
severity: medium
cvss: 5.7
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H'
cvssSource: cna
cwe:
  - CWE-400
vendor: envoyproxy
product: envoy
affected:
  - 'envoy >= 1.30.0, <= 1.30.1'
  - 'envoy >= 1.29.0, <= 1.29.4'
  - 'envoy >= 1.28.0, <= 1.28.3'
  - envoy <= 1.27.5
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2024-06-25T18:21:15.473753Z'
published: '2024-06-04'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T15:58:12.669Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2024-34364'
references:
  - url: >-
      https://github.com/envoyproxy/envoy/security/advisories/GHSA-xcj3-h7vf-fw26
    label: >-
      https://github.com/envoyproxy/envoy/security/advisories/GHSA-xcj3-h7vf-fw26
tags:
  - cve.org
epss: 0.00471
epssPercentile: 0.40907
ingestedAt: '2026-11-05T22:38:31.317Z'
---

## Overview

Envoy is a cloud-native, open source edge and service proxy. Envoy exposed an out-of-memory (OOM) vector from the mirror response, since async HTTP client will buffer the response with an unbounded buffer.

## Affected

- `envoy >= 1.30.0, <= 1.30.1`
- `envoy >= 1.29.0, <= 1.29.4`
- `envoy >= 1.28.0, <= 1.28.3`
- `envoy <= 1.27.5`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.