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CVE-2024-38473

51
FAUCET Score

CVE-2024-38473 is a high-severity encoding vulnerability in Apache HTTP Server versions 2.4.59 and earlier, affecting Apache and NetApp products. This flaw allows attackers to send malformed request URLs to backend services, potentially bypassing authentication. With a CVSS score of 8.1 (High) and an EPSS score indicating high exploitability, successful exploitation could lead to high confidentiality and availability impacts. While there is no evidence of active exploitation or Metasploit modules, Nuclei templates exist, and the vulnerability has garnered significant community discussion and media coverage. Users are strongly advised to upgrade to Apache HTTP Server 2.4.60 to mitigate this risk.

Impacted Technologies

VendorProductVersion(s)CPE
>= 2.4.0, < 2.4.60CPE matchmatch criteria
cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*
9CPE matchmatch criteria
cpe:2.3:a:netapp:ontap:9:*:*:*:*:*:*:*
>= 2.4.0, <= 2.4.59CPE match
cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.1HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
25.88%
Probability of exploitation in next 30 days
EPSS Percentile
97.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
Nuclei: CVE-2024-38473 · Jan 1, 1970
This CVE's current EPSS score of 0.2588 is in the 97th percentile among its peer group of 17,829 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (34)

apachepatch availablevia llm_extracted
Fixed in: 2.4
microsoftpatch availablevia msrc
Product: azl3 httpd 2.4.58-4 on Azure Linux 3.0Fixed in: 2.4.61-1
microsoftpatch availablevia msrc
Product: 17283-16823Fixed in: 2.4.61-1
microsoftpatch availablevia msrc
Product: 17684-17084Fixed in: 2.4.61-1
microsoftpatch availablevia msrc
Product: 19775-17086Fixed in: 2.4.61-1
microsoftpatch availablevia msrc
Product: 19781-17084Fixed in: 2.4.61-1
microsoftpatch availablevia msrc
Product: 17357-17086Fixed in: 2.4.61-1
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 x64Fixed in: 2.4.61-1
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 ARMFixed in: 2.4.61-1
microsoftpatch availablevia msrc
Product: Azure Linux 3.0 x64Fixed in: 2.4.61-1
microsoftpatch availablevia msrc
Product: Azure Linux 3.0 ARMFixed in: 2.4.61-1
microsoftpatch availablevia msrc
Product: cbl2 httpd 2.4.61-1 on CBL Mariner 2.0Fixed in: 2.4.61-1
microsoftpatch availablevia msrc
Product: azl3 httpd 2.4.61-1 on Azure Linux 3.0Fixed in: 2.4.61-1
microsoftpatch availablevia msrc
Product: cbl2 httpd 2.4.59-1 on CBL Mariner 2.0Fixed in: 2.4.61-1
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: httpd:2.4-8100020240712114234.489197e6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9.2 Extended Update SupportFixed in: httpd-0:2.4.53-11.el9_2.10
View patch
redhatpatch availablevia redhat_api
Product: Text-Only JBCSFixed in: jbcs-httpd24-httpd
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services on RHEL 7Fixed in: jbcs-httpd24-mod_md-1:2.4.24-11.el7jbcs
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services on RHEL 7Fixed in: jbcs-httpd24-mod_proxy_cluster-0:1.3.20-8.el7jbcs
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services on RHEL 7Fixed in: jbcs-httpd24-mod_security-0:2.9.3-40.el7jbcs
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: httpd-0:2.4.57-11.el9_4
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services for RHEL 8Fixed in: jbcs-httpd24-httpd-0:2.4.57-13.el8jbcs
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services for RHEL 8Fixed in: jbcs-httpd24-mod_http2-0:1.15.19-41.el8jbcs
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services for RHEL 8Fixed in: jbcs-httpd24-mod_jk-0:1.2.49-11.redhat_1.el8jbcs
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services for RHEL 8Fixed in: jbcs-httpd24-mod_md-1:2.4.24-11.el8jbcs
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services for RHEL 8Fixed in: jbcs-httpd24-mod_proxy_cluster-0:1.3.20-8.el8jbcs
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services for RHEL 8Fixed in: jbcs-httpd24-mod_security-0:2.9.3-40.el8jbcs
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services on RHEL 7Fixed in: jbcs-httpd24-httpd-0:2.4.57-13.el7jbcs
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services on RHEL 7Fixed in: jbcs-httpd24-mod_http2-0:1.15.19-41.el7jbcs
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services on RHEL 7Fixed in: jbcs-httpd24-mod_jk-0:1.2.49-11.redhat_1.el7jbcs
View patch
ubuntupatch availablevia ubuntu_usn
Product: apache2 (bionic)Fixed in: 2.4.29-1ubuntu4.27+esm7
ubuntupatch availablevia ubuntu_usn
Product: apache2 (focal)Fixed in: 2.4.41-4ubuntu3.23+esm3
ubuntupatch availablevia ubuntu_usn
Product: apache2 (trusty)Fixed in: 2.4.7-1ubuntu4.22+esm12
ubuntupatch availablevia ubuntu_usn
Product: apache2 (xenial)Fixed in: 2.4.18-2ubuntu3.17+esm17

Vendor Advisories (7)

ubuntuUSN-8338-1

Apache HTTP Server vulnerabilities

May 28, 2026
apachellm-apache-f398f8ed28802aa3LOW

Apache HTTP Server 2.4 vulnerabilities - The Apache HTTP Server Project

Mar 2, 2026
apachellm-apache-a7a91ec4c0e9421dHIGH

Apache HTTP Server 2.4 vulnerabilities - The Apache HTTP Server Project

Dec 10, 2025
microsoft2024-Dec/CVE-2024-38473

CVE-2024-38473

Dec 10, 2024
microsoft2024-Jul/CVE-2024-38473Important

Apache HTTP Server proxy encoding problem

Jul 9, 2024
redhatCVE-2024-38473Moderate

httpd: Encoding problem in mod_proxy

Jul 1, 2024
apachellm-apache-684e4d0003611bd4LOW

Apache HTTP Server 2.4 vulnerabilities - The Apache HTTP Server Project

References

openwall.com / lists/oss-security/2024/07/01/6
Mailing List
httpd.apache.org / security/vulnerabilities_24.html
Vendor Advisory
security.netapp.com / advisory/ntap-20240712-0001
Third Party Advisory