CVE-2024-5971Network attack vector

Service interruption via unterminated chunked responses

Published Jul 8, 2024 · Updated Sep 4, 2026

Denial of service in Red Hat Undertow allows remote attackers to exhaust server resources through unterminated chunked responses. After a response body is flushed, the chunked-response path fails to send the required zero-length terminating chunk, so clients wait while server resources remain occupied. The issue is reachable without authentication only when Undertow runs with Java 17 and TLS 1.3, and sustained requests can degrade or interrupt the service.

CVSS severity7.5
High
EPSS probability2.92%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Red Hat Undertow allows remote attackers to exhaust server resources through unterminated chunked responses. After a response body is flushed, the chunked-response path fails to send the required zero-length terminating chunk, so clients wait while server resources remain occupied. The issue is reachable without authentication only when Undertow runs with Java 17 and TLS 1.3, and sustained requests can degrade or interrupt the service.

The record

CVE
CVE-2024-5971
Published
Jul 8, 2024
Updated
Sep 4, 2026
Vendor
Red Hat
Product
Red Hat Fuse 7
Classifications
CWE-674, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 8, 2024CVE publishedPublication date reported by the CVE source.
  2. Sep 4, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Red Hat · Red Hat Fuse 7Affected versions are unavailable in this record.
Red Hat · Red Hat JBoss Enterprise Application PlatformAffected versions are unavailable in this record.
Red Hat · Undertowversion=0 <2.2.34.Final; version=2.3.0.Alpha1 <2.3.15.Final
Red Hat · Red Hat Integration - Camel KAffected versions are unavailable in this record.
Red Hat · Red Hat build of Apache Camel - HawtIO 4Affected versions are unavailable in this record.
Red Hat · Red Hat build of Apache Camel for Spring BootAffected versions are unavailable in this record.

Published CVSS scores

7.5Red HatCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
8.7GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-674Uncontrolled Recursion
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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