---
title: "CVE-2024-27919: HTTP/2: memory exhaustion due… | CubePath"
description: "Envoy is a cloud-native, open-source edge and service proxy. In versions 1.29.0 and 1.29.1, theEnvoy HTTP/2 protocol stack is vulnerable to the flood…"
language: en
source: https://cubepath.com/security/cve/CVE-2024-27919
---

# CVE-2024-27919: HTTP/2: memory exhaustion due… | CubePath

## Description

Envoy is a cloud-native, open-source edge and service proxy. In versions 1.29.0 and 1.29.1, theEnvoy HTTP/2 protocol stack is vulnerable to the flood of CONTINUATION frames. Envoy's HTTP/2 codec does not reset a request when header map limits have been exceeded. This allows an attacker to send an sequence of CONTINUATION frames without the END\_HEADERS bit set causing unlimited memory consumption. This can lead to denial of service through memory exhaustion. Users should upgrade to versions 1.29.2 to mitigate the effects of the CONTINUATION flood. Note that this vulnerability is a regression in Envoy version 1.29.0 and 1.29.1 only. As a workaround, downgrade to version 1.28.1 or earlier or disable HTTP/2 protocol for downstream connections.

Official description from the CVE record, published by GitHub\_M. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2024-27919)

## Key data

### CVSS 3.1 High 7.5

Score published by GitHub\_M in the CVE record.

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

| Metric                 | Value     | What it means                                                                       |
| ---------------------- | --------- | ----------------------------------------------------------------------------------- |
| Attack vector          | Network   | The vulnerable component can be reached over a network, possibly from the Internet. |
| Attack complexity      | Low       | No special conditions are needed. The attack can be repeated at will.               |
| Privileges required    | None      | No account or privileges are needed.                                                |
| User interaction       | None      | No action from any user is needed.                                                  |
| Scope                  | Unchanged | The impact stays within the vulnerable component.                                   |
| Confidentiality impact | None      | No effect on the secrecy of data.                                                   |
| Integrity impact       | None      | No effect on the trustworthiness of data.                                           |
| Availability impact    | High      | Serious or total effect on availability.                                            |

CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at [first.org/cvss](https://www.first.org/cvss/) .

### EPSS

Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days.

Score

0.83893 (83.9% probability)

Percentile

99.7%

Scores of

Nov 10, 2026

Model

v2026.06.15

### CISA assessment as of Jul 16, 2024

Stakeholder-Specific Vulnerability Categorization (SSVC) decision points added by CISA.

Automatable

yes

Technical impact

partial

### Weakness (CWE)

CWE catalog version 5.0.

CWE names: Copyright © 2006-2026, The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CWE license.

- [CWE-390](https://cwe.mitre.org/data/definitions/390.html) Detection of Error Condition Without Action

## Affected products

Products listed in the CVE record, as the CNA published them.

- envoyproxy envoy

  - affected: >= 1.29.0, < 1.29.2

## References

Links listed in the CVE record. They lead to other sites, which CubePath does not control.

- [github.com/envoyproxy/envoy/security/advisories/GHSA-gghf-v…](https://github.com/envoyproxy/envoy/security/advisories/GHSA-gghf-vfxp-799r)
- [github.com/envoyproxy/envoy/commit/57a02565532c18eb9df972a3…](https://github.com/envoyproxy/envoy/commit/57a02565532c18eb9df972a3e8974be3ae59f2d5)
- [openwall.com/lists/oss-security/2024/04/05/3](http://www.openwall.com/lists/oss-security/2024/04/05/3)
- [openwall.com/lists/oss-security/2024/04/03/16](http://www.openwall.com/lists/oss-security/2024/04/03/16)
- [kb.cert.org/vuls/id/421644](https://www.kb.cert.org/vuls/id/421644)

## Timeline

1. ID reserved Feb 28, 2024
2. Record published Apr 4, 2024
3. Record last updated Nov 4, 2025

## Look up another CVE

## About CubePath

CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection.

[Cloud VPS](https://cubepath.com/vps) [DDoS protection](https://cubepath.com/ddos-protection)

Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 20:04 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)