CVE-2024-24795Network attack vector

HTTP desynchronization via unneutralized backend headers

Published Apr 4, 2024 · Updated Nov 12, 2024

HTTP response splitting in Apache HTTP Server 2.4.0 through 2.4.58 allows remote attackers to desynchronize HTTP connections. The affected response-processing modules pass backend-generated header values without neutralizing CRLF delimiters; Apache has not named the modules or functions. Exploitation requires a backend that accepts injected response headers and a victim request sharing the desynchronized connection.

CVSS severity6.3
Medium
EPSS probability2.87%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

HTTP response splitting in Apache HTTP Server 2.4.0 through 2.4.58 allows remote attackers to desynchronize HTTP connections. The affected response-processing modules pass backend-generated header values without neutralizing CRLF delimiters; Apache has not named the modules or functions. Exploitation requires a backend that accepts injected response headers and a victim request sharing the desynchronized connection.

The record

CVE
CVE-2024-24795
Published
Apr 4, 2024
Updated
Nov 12, 2024
Vendor
The Apache Software Foundation
Product
Apache HTTP Server
Classifications
CWE-113, CAPEC-34, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 4, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 12, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.4.0 <=2.4.58

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Apache Software Foundation · Apache HTTP Serverversion=2.4.0 <=2.4.58

Published CVSS scores

6.3CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L

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-113Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')
CAPEC-34HTTP Response Splitting
T1190Exploit Public-Facing Application

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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