Is CVE-2024-53271 actively exploited?

CVE-2024-53271 has no public evidence of in-the-wild exploitation as of 2025-09-04.

What is the CVSS score for CVE-2024-53271?

CVE-2024-53271 has a CVSS score of 7.1 (HIGH severity). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H.

How do I patch CVE-2024-53271?

Patch guidance is available from envoyproxy security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2024-53271.

Which products are affected by CVE-2024-53271?

2 products: envoyproxy envoy, envoyproxy envoy.

Fix CVE-2024-53271 - HIGH envoyproxy envoy

Description

Envoy is a cloud-native high-performance edge/middle/service proxy. In affected versions envoy does not properly handle http 1.1 non-101 1xx responses. This can lead to downstream failures in networked devices. This issue has been addressed in versions 1.31.5 and 1.32.3. Users are advised to upgrade. There are no known workarounds for this issue.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Attack Vector: network
Complexity: low
Privileges: none
User Action: required
Scope: unchanged
Confidentiality: low
Integrity: none
Availability: high
Weaknesses: CWE-670

Metadata

Primary Vendor: ENVOYPROXY
Published: 12/18/2024
Last Modified: 9/4/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

envoyproxy : envoyenvoyproxy : envoy

Remediation Guidance

Executive Summary

Cite this page

CVE-2024-53271. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2024-53271

View on NIST NVD

CVE-2024-53271 vulnerability