CVE-2024-53271: envoy — Exploit & Fix

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.

Is your site exposed to CVE-2024-53271?

Run a free security scan — no signup, results in seconds.

CVSS v3.1 Score

7.1

HIGH

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

Weakness Type (CWE)

CWE-670 CWE-670

Affected Products

Vendor	Product	Versions
envoyproxy	envoy	1.31.0 — 1.31.5
envoyproxy	envoy	1.32.0 — 1.32.3

References

Advisories & Patches

https://github.com/envoyproxy/envoy/commit/da56f6da63079baecef9183436ee5f4141a59af8

Exploits

https://github.com/envoyproxy/envoy/security/advisories/GHSA-rmm5-h2wv-mg4f https://github.com/envoyproxy/envoy/security/advisories/GHSA-rmm5-h2wv-mg4f

Frequently Asked Questions

What is CVE-2024-53271? +

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. It has a CVSS v3.1 base score of 7.1 (HIGH).

How severe is CVE-2024-53271? +

CVE-2024-53271 has a CVSS v3.1 score of 7.1 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2024-53271? +

CVE-2024-53271 affects products from envoyproxy, specifically: envoy. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-53271? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

CVE-2026-55624

MintyItanium Lost-Auction is an auction plugin for Minecraft. Prior to commit 88c920b05042929db334ba06d57f052b42d6b3f8, players can take items like barrier blocks or …

CVE-2026-40942

The Data Sharing Framework (DSF) implements a distributed process engine based on the BPMN 2.0 and FHIR R4 standards. Prior …

CVE-2026-92932

In the MISP sachertortephp library, the Xml::build() static method in lib/Cake/Utility/Xml.php contains a logic error in the conditional that gates …

CVE-2025-24800

Hyperbridge is a hyper-scalable coprocessor for verifiable, cross-chain interoperability. A critical vulnerability was discovered in the ismp-grandpa crate, that allowed …

CVE-2025-43359 9.8

A logic issue was addressed with improved state management. This issue is fixed in iOS 18.7 and iPadOS 18.7, iOS …

CVE-2025-29312 9.1

An issue in onos v2.7.0 allows attackers to trigger unexpected behavior within a device connected to a legacy switch via …

CVE-2024-53271