---
id: CVE-2024-34362
title: Envoy affected by a crash (use-after-free) in EnvoyQuicServerStream
summary: >-
  Envoy is a cloud-native, open source edge and service proxy. There is a
  use-after-free in `HttpConnectionManager` (HCM) with `EnvoyQuicServerStream`
  that can crash Envoy. An attacker can exploit this vulnerability by sending a
  request wi…
severity: medium
cvss: 5.9
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H'
cvssSource: cna
cwe:
  - CWE-416
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: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2024-08-19T15:26:24.663947Z'
exploitAvailable: true
published: '2024-06-04'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T15:57:09.717Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2024-34362'
references:
  - url: >-
      https://github.com/envoyproxy/envoy/security/advisories/GHSA-hww5-43gv-35jv
    label: >-
      https://github.com/envoyproxy/envoy/security/advisories/GHSA-hww5-43gv-35jv
tags:
  - cve.org
  - exploit-available
epss: 0.00589
epssPercentile: 0.48291
ingestedAt: '2026-11-05T21:36:00.934Z'
---

## Overview

Envoy is a cloud-native, open source edge and service proxy. There is a use-after-free in `HttpConnectionManager` (HCM) with `EnvoyQuicServerStream` that can crash Envoy. An attacker can exploit this vulnerability by sending a request without `FIN`, then a `RESET_STREAM` frame, and then after receiving the response, closing the connection.

## 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.