Description
Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling') vulnerability in mod_proxy_ajp of Apache HTTP Server allows an attacker to smuggle requests to the AJP server it forwards requests to. This issue affects Apache HTTP Server Apache HTTP Server 2.4 version 2.4.53 and prior versions.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Apache Software Foundation | Apache HTTP Server | Apache HTTP Server 2.4 – ≤ 2.4.53 | — |
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 | 2.4.54-1 | — |
| Debian 13 | apache2 | 2.4.54-1 | — |
| Debian 12 | apache2 | 2.4.54-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | apache2 | 2.4.52-1ubuntu4.1 | USN-5487-1 |
| Ubuntu 20.04 LTS | apache2 | 2.4.41-4ubuntu3.12 | USN-5487-1 |
| Ubuntu 18.04 LTS | apache2 | 2.4.29-1ubuntu4.24 | USN-5487-3, USN-5487-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 16.04 LTS | apache2 | 2.4.18-2ubuntu3.17+esm6 | USN-5487-3, USN-5487-1 |
| Ubuntu Pro 14.04 LTS | apache2 | 2.4.7-1ubuntu4.22+esm5 | USN-5487-3, USN-5487-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | httpd +8 | 2.4.53-7.el9 | RHSA-2022:8067 |
| RHEL 9 | mod_ssl +1 | 1:2.4.53-7.el9 | RHSA-2022:8067 |
| RHEL 8 | httpd +6 | 2.4.37-51.module+el8.7.0+16050+02173b8e | RHSA-2022:7647 |
| RHEL 8 | mod_http2 | 1.15.7-5.module+el8.6.0+13996+01710940 | RHSA-2022:7647 |
| RHEL 8 | mod_md | 1:2.0.8-8.module+el8.3.0+6814+67d1e611 | RHSA-2022:7647 |
| RHEL 8 | mod_ssl +1 | 1:2.4.37-51.module+el8.7.0+16050+02173b8e | RHSA-2022:7647 |
| RHEL 3 | httpd24-httpd +5 | 2.4.34-23.el7.5 | RHSA-2022:6753 |
| RHEL 3 | httpd24-mod_ssl +1 | 1:2.4.34-23.el7.5 | RHSA-2022:6753 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat JBoss Core Services 1 | jbcs-httpd24-curl +2 | 7.86.0-2.el7jbcs | RHSA-2022:8840 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-httpd +6 | 2.4.51-37.el7jbcs | RHSA-2022:8840 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_http2 | 1.15.19-20.el7jbcs | RHSA-2022:8840 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_ssl +1 | 1:2.4.51-37.el7jbcs | RHSA-2022:8840 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-openssl +4 | 1:1.1.1k-13.el7jbcs | RHSA-2022:8840 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 9 | httpd +8 | 2.4.53-7.el9 | ALSA-2022:8067 |
| AlmaLinux 9 | mod_ssl +1 | 1:2.4.53-7.el9 | ALSA-2022:8067 |
| AlmaLinux 8 | httpd +6 | 2.4.37-51.module_el8.7.0+3281+01e58653 | ALSA-2022:7647 |
| AlmaLinux 8 | mod_http2 | 1.15.7-5.module_el8.6.0+2872+fe0ff7aa | ALSA-2022:7647 |
| AlmaLinux 8 | mod_md | 1:2.0.8-8.module_el8.6.0+2872+fe0ff7aa | ALSA-2022:7647 |
| AlmaLinux 8 | mod_ssl +1 | 1:2.4.37-51.module_el8.7.0+3281+01e58653 | ALSA-2022:7647 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 9 | httpd | 2.4.53-7.el9 | RLSA-2022:8067 |
| Rocky Linux 8 | httpd | 2.4.37-51.module+el8.7.0+1059+126e9251 | RLSA-2022:7647 |
| Rocky Linux 8 | mod_http2 | 1.15.7-5.module+el8.6.0+823+f143cee1 | RLSA-2022:7647 |
| Rocky Linux 8 | mod_md | 1:2.0.8-8.module+el8.4.0+553+7a69454b | RLSA-2022:7647 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP5 | apache2 | 2.4.66-150400.6.57.1 | SUSE-SU-2026:2686-1 |
| SLES 15 SP4 | apache2 | 2.4.51-150400.6.3.1 | SUSE-SU-2026:2686-1, SUSE-SU-2022:2302-1 |
| SLES 15 SP3 | apache2 | 2.4.51-150200.3.48.1 | SUSE-SU-2022:2342-1 |
| SLES 15 SP2 | apache2 | 2.4.51-150200.3.48.1 | SUSE-SU-2022:2342-1 |
| SLES 15 SP1 | apache2 | 2.4.33-150000.3.69.1 | SUSE-SU-2022:2338-1 |
Show 28 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 | apache2 | 2.4.33-150000.3.69.1 | SUSE-SU-2022:2338-1 |
| SLES 12 SP5 | apache2 | 2.4.51-35.19.1 | SUSE-SU-2022:2101-1 |
| SLES 12 SP4 | apache2 | 2.4.23-29.91.1 | SUSE-SU-2022:2099-1 |
| SLES 12 SP3 | apache2 | 2.4.23-29.91.1 | SUSE-SU-2022:2099-1 |
| SLES 12 SP2 | apache2 | 2.4.23-29.91.1 | SUSE-SU-2022:2099-1 |
| SLES for SAP 15 SP5 | apache2 | 2.4.66-150400.6.57.1 | SUSE-SU-2026:2686-1 |
| SLES for SAP 15 SP4 | apache2 | 2.4.66-150400.6.57.1 | SUSE-SU-2026:2686-1 |
| SLES for SAP 15 SP2 | apache2 | 2.4.51-150200.3.48.1 | SUSE-SU-2022:2342-1 |
| SLES for SAP 15 SP1 | apache2 | 2.4.33-150000.3.69.1 | SUSE-SU-2022:2338-1 |
| SLES for SAP 15 | apache2 | 2.4.33-150000.3.69.1 | SUSE-SU-2022:2338-1 |
| SLES for SAP 12 SP5 | apache2 | 2.4.51-35.19.1 | SUSE-SU-2022:2101-1 |
| SLES for SAP 12 SP4 | apache2 | 2.4.23-29.91.1 | SUSE-SU-2022:2099-1 |
| SLES for SAP 12 SP3 | apache2 | 2.4.23-29.91.1 | SUSE-SU-2022:2099-1 |
| SLE HPC 15 SP5 | apache2 | 2.4.66-150400.6.57.1 | SUSE-SU-2026:2686-1 |
| SLE HPC 15 SP4 | apache2 | 2.4.66-150400.6.57.1 | SUSE-SU-2026:2686-1 |
| SLE HPC 15 SP2 | apache2 | 2.4.51-150200.3.48.1 | SUSE-SU-2022:2342-1 |
| SLE HPC 15 SP1 | apache2 | 2.4.33-150000.3.69.1 | SUSE-SU-2022:2338-1 |
| SLE HPC 15 | apache2 | 2.4.33-150000.3.69.1 | SUSE-SU-2022:2338-1 |
| SUSE OpenStack Cloud Crowbar 9 | apache2 | 2.4.23-29.91.1 | SUSE-SU-2022:2099-1 |
| SUSE OpenStack Cloud Crowbar 8 | apache2 | 2.4.23-29.91.1 | SUSE-SU-2022:2099-1 |
| SUSE OpenStack Cloud 9 | apache2 | 2.4.23-29.91.1 | SUSE-SU-2022:2099-1 |
| SUSE OpenStack Cloud 8 | apache2 | 2.4.23-29.91.1 | SUSE-SU-2022:2099-1 |
| SUSE Manager Server 4.1 | apache2 | 2.4.51-150200.3.48.1 | SUSE-SU-2022:2342-1 |
| SUSE Manager Retail Branch Server 4.1 | apache2 | 2.4.51-150200.3.48.1 | SUSE-SU-2022:2342-1 |
| SUSE Manager Proxy 4.1 | apache2 | 2.4.51-150200.3.48.1 | SUSE-SU-2022:2342-1 |
| SUSE HPE Helion OpenStack 8 | apache2 | 2.4.23-29.91.1 | SUSE-SU-2022:2099-1 |
| SUSE Enterprise Storage 7 | apache2 | 2.4.51-150200.3.48.1 | SUSE-SU-2022:2342-1 |
| SUSE Enterprise Storage 6 | apache2 | 2.4.33-150000.3.69.1 | SUSE-SU-2022:2338-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | apache2 | 2.4.54-1.1 | openSUSE-SU-2024:12142-1 |
| openSUSE Leap 15.4 | apache2 | 2.4.51-150400.6.3.1 | SUSE-SU-2022:2302-1 |
| openSUSE Leap 15.3 | apache2 | 2.4.51-150200.3.48.1 | SUSE-SU-2022:2342-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | apache2 | 2.4.54-r0 | — |
| Alpine v3.23 | apache2 | 2.4.54-r0 | — |
| Alpine v3.22 | apache2 | 2.4.54-r0 | — |
| Alpine v3.21 | apache2 | 2.4.54-r0 | — |
| Alpine v3.20 | apache2 | 2.4.54-r0 | — |
Show 7 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | apache2 | 2.4.54-r0 | — |
| Alpine v3.18 | apache2 | 2.4.54-r0 | — |
| Alpine v3.17 | apache2 | 2.4.54-r0 | — |
| Alpine v3.16 | apache2 | 2.4.54-r0 | — |
| Alpine v3.15 | apache2 | 2.4.54-r0 | — |
| Alpine v3.14 | apache2 | 2.4.54-r0 | — |
| Alpine v3.13 | apache2 | 2.4.54-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | httpd +8 | 2.4.54-3.amzn2023.0.4 | ALAS2023-2023-072 |
| Amazon Linux 2023 | mod_ssl +1 | 1:2.4.54-3.amzn2023.0.4 | ALAS2023-2023-072 |
| Amazon Linux 2 | httpd +7 | 2.4.54-1.amzn2 | ALAS2-2022-1812 |
| Amazon Linux 2 | mod_ssl +1 | 1:2.4.54-1.amzn2 | ALAS2-2022-1812 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | httpd +8 | 2.4.53-7.0.1.el9 | ELSA-2022-8067 |
| Oracle Linux 9 | mod_ssl +1 | 1:2.4.53-7.0.1.el9 | ELSA-2022-8067 |
| Oracle Linux 8 | httpd +6 | 2.4.37-51.0.1.module+el8.7.0+20778+02173b8e | ELSA-2022-7647 |
| Oracle Linux 8 | mod_http2 | 1.15.7-5.module+el8.6.0+20548+01710940 | ELSA-2022-7647 |
| Oracle Linux 8 | mod_md | 1:2.0.8-8.module+el8.5.0+20475+4f6a8fd5 | ELSA-2022-7647 |
| Oracle Linux 8 | mod_ssl +1 | 1:2.4.37-51.0.1.module+el8.7.0+20778+02173b8e | ELSA-2022-7647 |
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 1 repository
-
watchtowrlabs/ibm-qradar-ajp_smuggling_CVE-2022-26377_poc ★ 5 · Apr 12, 2024
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 24
- ALSA-2022:8067 Moderate: httpd security, bug fix, and enhancement update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2022:7647 Moderate: httpd:2.4 security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2022:8840 Red Hat Security Advisory: Red Hat JBoss Core Services Apache HTTP Server 2.4.51 SP1 security update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2022:8067 Red Hat Security Advisory: httpd security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 9, 2026
- RHSA-2022:7647 Red Hat Security Advisory: httpd:2.4 security update Red Hat Security Advisories (RHSA) · Oct 9, 2026
- RHSA-2022:6753 Red Hat Security Advisory: httpd24-httpd security and bug fix update Red Hat Security Advisories (RHSA) · Oct 9, 2026
- SUSE-SU-2026:2686-1 Security update for apache2 SUSE / openSUSE Security Updates · Jul 1, 2026
- WID-SEC-2022-0192 Apache HTTP Server: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jun 30, 2026
- USN-5487-3 apache2 regression Ubuntu Security Notices (USN) · Jun 29, 2026
- USN-5487-1 apache2 vulnerabilities Ubuntu Security Notices (USN) · Jun 29, 2026
- RLSA-2022:8067 Moderate: httpd security, bug fix, and enhancement update Rocky Linux Security Advisories · Feb 5, 2026
- RLSA-2022:7647 Moderate: httpd:2.4 security update Rocky Linux Security Advisories · Feb 5, 2026
- SUSE-SU-2022:2342-1 Security update for apache2 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:2101-1 Security update for apache2 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:2099-1 Security update for apache2 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:2302-1 Security update for apache2 SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:12142-1 apache2-2.4.54-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:2338-1 Security update for apache2 SUSE / openSUSE Security Updates · May 2, 2025
- ICSA-25-133-01 Hitachi Energy Service Suite CISA ICS & IT advisories · Feb 25, 2025
- WID-SEC-2024-1591 Juniper JUNOS: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 11, 2024
- ALAS2023-2023-072 Important: httpd security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Feb 22, 2023
- ELSA-2022-8067 Moderate: httpd security, bug fix, and enhancement update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Nov 22, 2022
- ELSA-2022-7647 Moderate: httpd:2.4 security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Nov 15, 2022
- ALAS2-2022-1812 Moderate: httpd security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Jul 14, 2022
References
- https://httpd.apache.org/security/vulnerabilities_24.html
- [oss-security] 20220608 CVE-2022-26377: Apache HTTP Server: mod_proxy_ajp: Possible request smuggling mailing-list
- https://security.netapp.com/advisory/ntap-20220624-0005/
- FEDORA-2022-e620fb15d5 vendor-advisory
- FEDORA-2022-b54a8dee29 vendor-advisory
- GLSA-202208-20 vendor-advisory