Description
Encoding problem in mod_proxy in Apache HTTP Server 2.4.59 and earlier allows request URLs with incorrect encoding to be sent to backend services, potentially bypassing authentication via crafted requests.
Users are recommended to upgrade to version 2.4.60, which fixes this issue.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Apache Software Foundation | Apache HTTP Server | 2.4.0 – ≤ 2.4.59 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | apache2 | 2.4.60-1 | — |
| Debian 13 | apache2 | 2.4.60-1 | — |
| Debian 12 | apache2 | 2.4.61-1~deb12u1 | DSA-5729-1 |
| Debian 11 | apache2 | 2.4.61-1~deb11u1 | DSA-5729-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | apache2 | 2.4.58-1ubuntu8.2 | USN-6885-1 |
| Ubuntu 22.04 LTS | apache2 | 2.4.52-1ubuntu4.10 | USN-6885-1 |
| Ubuntu 20.04 LTS | apache2 | 2.4.41-4ubuntu3.19 | USN-6885-1 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | apache2 | 2.4.41-4ubuntu3.23+esm3 | USN-8338-1 |
| Ubuntu Pro 18.04 LTS | apache2 | 2.4.29-1ubuntu4.27+esm7 | USN-8338-1 |
| Ubuntu Pro 16.04 LTS | apache2 | 2.4.18-2ubuntu3.17+esm17 | USN-8338-1 |
| Ubuntu Pro 14.04 LTS | apache2 | 2.4.7-1ubuntu4.22+esm12 | USN-8338-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | httpd +8 | 2.4.57-11.el9_4 | RHSA-2024:4726 |
| RHEL 9 | mod_ssl +1 | 1:2.4.57-11.el9_4 | RHSA-2024:4726 |
| RHEL 8 | httpd +6 | 2.4.37-65.module+el8.10.0+22069+b47f5c72.1 | RHSA-2024:4720 |
| RHEL 8 | mod_http2 | 1.15.7-10.module+el8.10.0+21653+eaff63f0 | RHSA-2024:4720 |
| RHEL 8 | mod_md | 1:2.0.8-8.module+el8.9.0+19080+567b90f8 | RHSA-2024:4720 |
| RHEL 8 | mod_ssl +1 | 1:2.4.37-65.module+el8.10.0+22069+b47f5c72.1 | RHSA-2024:4720 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9.2 EUS | httpd +8 | 2.4.53-11.el9_2.10 | RHSA-2024:5001 |
| RHEL 9.2 EUS | mod_ssl +1 | 1:2.4.53-11.el9_2.10 | RHSA-2024:5001 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-httpd +6 | 2.4.57-13.el7jbcs | RHSA-2024:5239 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_http2 | 1.15.19-41.el7jbcs | RHSA-2024:5239 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_jk +1 | 1.2.49-11.redhat_1.el7jbcs | RHSA-2024:5239 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_md | 1:2.4.24-11.el7jbcs | RHSA-2024:5239 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_proxy_cluster | 1.3.20-8.el7jbcs | RHSA-2024:5239 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_security | 2.9.3-40.el7jbcs | RHSA-2024:5239 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_ssl +1 | 1:2.4.57-13.el7jbcs | RHSA-2024:5239 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 9 | httpd +8 | 2.4.57-11.el9_4 | ALSA-2024:4726 |
| AlmaLinux 9 | mod_ssl +1 | 1:2.4.57-11.el9_4 | ALSA-2024:4726 |
| AlmaLinux 8 | httpd +6 | 2.4.37-65.module_el8.10.0+3872+9b8ab21e.1 | ALSA-2024:4720 |
| AlmaLinux 8 | mod_http2 | 1.15.7-10.module_el8.10.0+3832+564e7653 | ALSA-2024:4720 |
| AlmaLinux 8 | mod_md | 1:2.0.8-8.module_el8.6.0+2872+fe0ff7aa | ALSA-2024:4720 |
| AlmaLinux 8 | mod_ssl +1 | 1:2.4.37-65.module_el8.10.0+3872+9b8ab21e.1 | ALSA-2024:4720 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 9 | httpd | 2.4.57-11.el9_4 | RLSA-2024:4726 |
| Rocky Linux 8 | httpd | 2.4.37-65.module+el8.10.0+1830+22f0c9e0 | RLSA-2024:4720 |
| Rocky Linux 8 | mod_http2 | 1.15.7-10.module+el8.10.0+1775+6b057638 | RLSA-2024:4720 |
| Rocky Linux 8 | mod_md | 1:2.0.8-8.module+el8.9.0+1370+89cc8ad5 | RLSA-2024:4720 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP6 | apache2 | 2.4.51-150400.6.34.1 | SUSE-SU-2024:3173-1, SUSE-SU-2024:3172-1 |
| SLES 15 SP6 | apache2-devel +4 | 2.4.58-150600.5.23.1 | SUSE-SU-2024:3172-1 |
| SLES 15 SP5 | apache2 | 2.4.51-150400.6.34.1 | SUSE-SU-2026:2686-1, SUSE-SU-2024:3173-1 |
| SLES 15 SP4 | apache2 | 2.4.51-150400.6.34.1 | SUSE-SU-2026:2686-1, SUSE-SU-2024:3173-1 |
| SLES 15 SP3 | apache2 | 2.4.51-150200.3.73.1 | SUSE-SU-2024:2997-1 |
| SLES 15 SP2 | apache2 | 2.4.51-150200.3.73.1 | SUSE-SU-2024:2997-1 |
Show 13 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP5 | apache2 | 2.4.51-35.57.1 | SUSE-SU-2024:2999-1 |
| SLES 12 SP5 | apache2-tls13 | 2.4.51-35.57.2 | SUSE-SU-2024:2999-1 |
| SLES for SAP 15 SP5 | apache2 | 2.4.66-150400.6.57.1 | SUSE-SU-2026:2686-1 |
| SLES for SAP 15 SP4 | apache2 | 2.4.51-150400.6.34.1 | SUSE-SU-2026:2686-1, SUSE-SU-2024:3173-1 |
| SLES for SAP 15 SP3 | apache2 | 2.4.51-150200.3.73.1 | SUSE-SU-2024:2997-1 |
| SLES for SAP 15 SP2 | apache2 | 2.4.51-150200.3.73.1 | SUSE-SU-2024:2997-1 |
| SLES for SAP 12 SP5 | apache2 | 2.4.51-35.57.1 | SUSE-SU-2024:2999-1 |
| SLES for SAP 12 SP5 | apache2-tls13 | 2.4.51-35.57.2 | SUSE-SU-2024:2999-1 |
| SLE HPC 15 SP5 | apache2 | 2.4.66-150400.6.57.1 | SUSE-SU-2026:2686-1 |
| SLE HPC 15 SP4 | apache2 | 2.4.51-150400.6.34.1 | SUSE-SU-2026:2686-1, SUSE-SU-2024:3173-1 |
| SLE HPC 15 SP3 | apache2 | 2.4.51-150200.3.73.1 | SUSE-SU-2024:2997-1 |
| SLE HPC 15 SP2 | apache2 | 2.4.51-150200.3.73.1 | SUSE-SU-2024:2997-1 |
| SUSE Manager Server 4.3 | apache2 | 2.4.51-150400.6.34.1 | SUSE-SU-2024:3173-1 |
| SUSE Manager Proxy 4.3 | apache2 | 2.4.51-150400.6.34.1 | SUSE-SU-2024:3173-1 |
| SUSE Enterprise Storage 7.1 | apache2 | 2.4.51-150200.3.73.1 | SUSE-SU-2024:2997-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | apache2 | 2.4.61-1.1 | openSUSE-SU-2024:14116-1 |
| openSUSE Leap 15.6 | apache2 +6 | 2.4.58-150600.5.23.1 | SUSE-SU-2024:3172-1 |
| openSUSE Leap 15.5 | apache2 | 2.4.51-150400.6.34.1 | SUSE-SU-2024:3173-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | apache2 | 2.4.60-r0 | — |
| Alpine v3.23 | apache2 | 2.4.60-r0 | — |
| Alpine v3.22 | apache2 | 2.4.60-r0 | — |
| Alpine v3.21 | apache2 | 2.4.60-r0 | — |
| Alpine v3.20 | apache2 | 2.4.60-r0 | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | apache2 | 2.4.60-r0 | — |
| Alpine v3.18 | apache2 | 2.4.60-r0 | — |
| Alpine v3.17 | apache2 | 2.4.60-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | httpd +8 | 2.4.61-1.amzn2023 | ALAS2023-2024-656 |
| Amazon Linux 2023 | mod_ssl +1 | 1:2.4.61-1.amzn2023 | ALAS2023-2024-656 |
| Amazon Linux 2 | httpd +7 | 2.4.61-1.amzn2.0.1 | ALAS2-2024-2594 |
| Amazon Linux 2 | mod_ssl +1 | 1:2.4.61-1.amzn2.0.1 | ALAS2-2024-2594 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | httpd | 2.4.61-1 | — |
| Azure Linux 2 (CBL-Mariner) | httpd | 2.4.61-1 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | httpd +8 | 2.4.57-11.0.1.el9_4 | ELSA-2024-4726 |
| Oracle Linux 9 | mod_ssl +1 | 1:2.4.57-11.0.1.el9_4 | ELSA-2024-4726 |
| Oracle Linux 8 | httpd +6 | 2.4.37-65.0.1.module+el8.10.0+90368+a557a4bf.1 | ELSA-2024-4720 |
| Oracle Linux 8 | mod_http2 | 1.15.7-10.module+el8.10.0+90327+96b8ea28 | ELSA-2024-4720 |
| Oracle Linux 8 | mod_md | 1:2.0.8-8.module+el8.9.0+90011+2f9c6a23 | ELSA-2024-4720 |
| Oracle Linux 8 | mod_ssl +1 | 1:2.4.37-65.0.1.module+el8.10.0+90368+a557a4bf.1 | ELSA-2024-4720 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
GitHub 2 repositories
-
juanschallibaum/CVE-2024-38473-Nuclei-Template ★ 30 · Aug 23, 2024
Nuclei template to detect Apache servers vulnerable to CVE-2024-38473
-
Abdurahmon3236/CVE-2024-38473 ★ 3 · Aug 2, 2024
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Automated scanner template
A ready-made Nuclei template detects this vulnerability automatically. Vulnerabilities with public scanner templates are typically probed across the internet soon after the template appears — exposed systems should be patched first.
- Apache HTTP Server - ACL Bypass http/cves/2024/CVE-2024-38473.yaml
Source: projectdiscovery/nuclei-templates (MIT) — updated daily. Only links are listed.
Advisories 26
- WID-SEC-2024-1504 Apache HTTP Server: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 11, 2026
- ALSA-2024:4726 Important: httpd security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2024:4720 Important: httpd:2.4 security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2024:5239 Red Hat Security Advisory: Red Hat JBoss Core Services Apache HTTP Server 2.4.57 SP5 security update Red Hat Security Advisories (RHSA) · Sep 21, 2026
- RHSA-2024:5001 Red Hat Security Advisory: httpd security update Red Hat Security Advisories (RHSA) · Sep 21, 2026
- RHSA-2024:4726 Red Hat Security Advisory: httpd security update Red Hat Security Advisories (RHSA) · Sep 21, 2026
- RHSA-2024:4720 Red Hat Security Advisory: httpd:2.4 security update Red Hat Security Advisories (RHSA) · Sep 21, 2026
- SUSE-SU-2026:2686-1 Security update for apache2 SUSE / openSUSE Security Updates · Jul 1, 2026
- USN-8338-1 apache2 vulnerabilities Ubuntu Security Notices (USN) · May 29, 2026
- USN-6885-1 apache2 vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- DSA-5729-1 apache2 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- WID-SEC-2024-1913 Red Hat OpenShift Container Platform: Mehrere Schwachstellen BSI CERT-Bund (WID) · Mar 3, 2026
- RLSA-2024:4726 Important: httpd security update Rocky Linux Security Advisories · Feb 5, 2026
- openSUSE-SU-2024:14116-1 apache2-2.4.61-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:2999-1 Security update for apache2 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:3172-1 Security update for apache2 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:2997-1 Security update for apache2 SUSE / openSUSE Security Updates · Feb 4, 2026
- RLSA-2024:4720 Important: httpd:2.4 security update Rocky Linux Security Advisories · May 7, 2025
- SUSE-SU-2024:3173-1 Security update for apache2 SUSE / openSUSE Security Updates · May 2, 2025
- NCSC-2025-0027 Kwetsbaarheden verholpen in Oracle Fusion Middleware NCSC-NL (Netherlands) · Jan 22, 2025
- NCSC-2024-0411 Kwetsbaarheden verholpen in Oracle Database producten NCSC-NL (Netherlands) · Oct 17, 2024
- ELSA-2024-4726 Important: httpd security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Jul 23, 2024
- ELSA-2024-4720 Important: httpd:2.4 security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Jul 23, 2024
- ALAS2023-2024-656 Important: httpd security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Jul 22, 2024
- ALAS2-2024-2594 Important: httpd security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Jul 22, 2024
- NCSC-2024-0275 Kwetsbaarheden verholpen in Apache HHTP-server NCSC-NL (Netherlands) · Jul 2, 2024