Description
Improper Input Validation vulnerability in Apache Tomcat.Tomcat from 11.0.0-M1 through 11.0.0-M11, from 10.1.0-M1 through 10.1.13, from 9.0.0-M1 through 9.0.81 and from 8.5.0 through 8.5.93 did not correctly parse HTTP trailer headers. A specially
crafted, invalid trailer header could cause Tomcat to treat a single
request as multiple requests leading to the possibility of request
smuggling when behind a reverse proxy.
Older, EOL versions may also be affected.
Users are recommended to upgrade to version 11.0.0-M12 onwards, 10.1.14 onwards, 9.0.81 onwards or 8.5.94 onwards, which fix the issue.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Apache Software Foundation | Apache Tomcat | 11.0.0-M1 – ≤ 11.0.0-M11, 10.1.0-M1 – ≤ 10.1.13, 9.0.0-M1 – ≤ 9.0.81, 8.5.0 – ≤ 8.5.93 | — |
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 | tomcat10 | 10.1.14-1 | — |
| Debian 14 | tomcat9 | 9.0.70-2 | — |
| Debian 13 | tomcat10 | 10.1.14-1 | — |
| Debian 13 | tomcat9 | 9.0.70-2 | — |
| Debian 12 | tomcat10 | 10.1.6-1+deb12u1 | DSA-5521-1 |
| Debian 12 | tomcat9 | 9.0.70-2 | — |
| Debian 11 | tomcat9 | 9.0.43-2~deb11u7 | DSA-5522-1 |
| Debian 10 | tomcat9 | 9.0.31-1~deb10u9 | DLA-3617-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 25.10 | tomcat9 | 9.0.70-2ubuntu3 | — |
| Ubuntu 20.04 LTS | tomcat9 | 9.0.31-1ubuntu0.8 | USN-7106-1 |
Show 6 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 24.04 LTS | tomcat10 | 10.1.16-1ubuntu0.1~esm2 | USN-7562-1 |
| Ubuntu Pro 24.04 LTS | tomcat9 | 9.0.70-2ubuntu0.1+esm2 | USN-7562-1 |
| Ubuntu Pro 22.04 LTS | tomcat9 | 9.0.58-1ubuntu0.1+esm4 | USN-7562-1, USN-7106-1 |
| Ubuntu Pro 20.04 LTS | tomcat9 | 9.0.31-1ubuntu0.9+esm2 | USN-7562-1 |
| Ubuntu Pro 18.04 LTS | tomcat8 | 8.5.39-1ubuntu1~18.04.3+esm5 | USN-7562-1 |
| Ubuntu Pro 18.04 LTS | tomcat9 | 9.0.16-3ubuntu0.18.04.2+esm4 | USN-7562-1, USN-7106-1 |
| Ubuntu Pro 16.04 LTS | tomcat7 +1 | No fix yet | — |
| Ubuntu Pro 14.04 LTS | tomcat6 +1 | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10 | tomcat +7 | 1:10.1.36-1.el10_0 | RHSA-2025:7497 |
| RHEL 9 | tomcat +7 | 1:9.0.62-37.el9_3.1 | RHSA-2024:0474 |
| RHEL 8 | tomcat +7 | 1:9.0.62-27.el8_9.2 | RHSA-2024:0125 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8.8 EUS | tomcat +7 | 1:9.0.87-1.el8_8.2 | RHSA-2024:3814 |
| Red Hat JBoss Web Server 5 | jws5-tomcat +11 | 9.0.62-18.redhat_00016.1.el7jws | RHSA-2023:6206 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 9 | tomcat +7 | 1:9.0.62-37.el9_3.1 | ALSA-2024:0474 |
| AlmaLinux 8 | tomcat +7 | 1:9.0.62-27.el8_9.2 | ALSA-2024:0125 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP5 | tomcat | 9.0.85-150200.57.1 | SUSE-SU-2024:0472-1 |
| SLES 15 SP4 | tomcat | 9.0.85-150200.57.1 | SUSE-SU-2024:0472-1 |
| SLES 15 SP3 | tomcat | 9.0.85-150200.57.1 | SUSE-SU-2024:0472-1 |
| SLES 15 SP2 | tomcat | 9.0.85-150200.57.1 | SUSE-SU-2024:0472-1 |
| SLES 15 SP1 | tomcat | 9.0.36-150100.4.98.1 | SUSE-SU-2023:4423-1 |
Show 12 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP5 | tomcat | 9.0.36-3.111.1 | SUSE-SU-2023:4337-1 |
| SLES for SAP 15 SP4 | tomcat | 9.0.85-150200.57.1 | SUSE-SU-2024:0472-1 |
| SLES for SAP 15 SP3 | tomcat | 9.0.85-150200.57.1 | SUSE-SU-2024:0472-1 |
| SLES for SAP 15 SP2 | tomcat | 9.0.85-150200.57.1 | SUSE-SU-2024:0472-1 |
| SLES for SAP 15 SP1 | tomcat | 9.0.36-150100.4.98.1 | SUSE-SU-2023:4423-1 |
| SLES for SAP 12 SP5 | tomcat | 9.0.36-3.111.1 | SUSE-SU-2023:4337-1 |
| SLE HPC 15 SP4 | tomcat | 9.0.85-150200.57.1 | SUSE-SU-2024:0472-1 |
| SLE HPC 15 SP3 | tomcat | 9.0.85-150200.57.1 | SUSE-SU-2024:0472-1 |
| SLE HPC 15 SP2 | tomcat | 9.0.85-150200.57.1 | SUSE-SU-2024:0472-1 |
| SLE HPC 15 SP1 | tomcat | 9.0.36-150100.4.98.1 | SUSE-SU-2023:4423-1 |
| SUSE Manager Server 4.3 | tomcat | 9.0.85-150200.57.1 | SUSE-SU-2024:0472-1 |
| SUSE Enterprise Storage 7.1 | tomcat | 9.0.85-150200.57.1 | SUSE-SU-2024:0472-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | tomcat | 9.0.82-2.1 | openSUSE-SU-2024:13382-1 |
| openSUSE Leap 15.5 | tomcat | 9.0.85-150200.57.1 | SUSE-SU-2024:0472-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | tomcat9 +7 | 1:9.0.82-1.amzn2023.0.1 | ALAS2023-2023-415 |
| Amazon Linux 2 | tomcat +9 | 7.0.76-10.amzn2.0.7 | ALAS2-2024-2501 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | tomcat +7 | 1:9.0.62-37.el9_3.1 | ELSA-2024-0474 |
| Oracle Linux 8 | tomcat +7 | 1:9.0.62-27.el8_9.2 | ELSA-2024-0125 |
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 Tomcat - HTTP Request Smuggling http/cves/2023/CVE-2023-45648.yaml
Source: projectdiscovery/nuclei-templates (MIT) — updated daily. Only links are listed.
Affected packages
Advisories 30
- ALSA-2024:0474 Moderate: tomcat security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2024:0125 Moderate: tomcat security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2025:7497 Red Hat Security Advisory: tomcat security update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2024:3814 Red Hat Security Advisory: tomcat security and bug fix update Red Hat Security Advisories (RHSA) · Oct 13, 2026
- RHSA-2024:0474 Red Hat Security Advisory: tomcat security update Red Hat Security Advisories (RHSA) · Oct 13, 2026
- RHSA-2024:0125 Red Hat Security Advisory: tomcat security update Red Hat Security Advisories (RHSA) · Oct 13, 2026
- RHSA-2023:6206 Red Hat Security Advisory: Red Hat JBoss Web Server 5.7.6 release and security update Red Hat Security Advisories (RHSA) · Sep 28, 2026
- WID-SEC-2023-2628 Apache Tomcat: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jun 17, 2026
- USN-7562-1 tomcat vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- USN-7106-1 tomcat9 vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- DSA-5521-1 tomcat10 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-5522-1 tomcat9 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-3617-1 tomcat9 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2023:4337-1 Security update for tomcat SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:0472-1 Security update for tomcat SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:4423-1 Security update for tomcat SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:13382-1 tomcat-9.0.82-2.1 on GA media SUSE / openSUSE Security Updates · May 7, 2025
- NCSC-2025-0123 Kwetsbaarheden verholpen in Oracle Database Producten NCSC-NL (Netherlands) · Apr 16, 2025
- NCSC-2024-0332 Kwetsbaarheden verholpen in Siemens producten NCSC-NL (Netherlands) · Aug 13, 2024
- SSA-784301 SSA-784301: Multiple Vulnerabilities in SINEC NMS Before V3.0 Siemens ProductCERT · Aug 13, 2024
- ICSA-24-228-06 Siemens SINEC NMS CISA ICS & IT advisories · Aug 13, 2024
- WID-SEC-2024-1238 HPE HP-UX: Mehrere Schwachstellen BSI CERT-Bund (WID) · May 27, 2024
- ALAS2-2024-2501 Important: tomcat security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Mar 18, 2024
- WID-SEC-2024-0528 Dell Data Protection Advisor: Mehrere Schwachstellen BSI CERT-Bund (WID) · Feb 29, 2024
- ELSA-2024-0474 Moderate: tomcat security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Jan 25, 2024
- WID-SEC-2024-0107 Oracle Communications Applications: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jan 16, 2024
- WID-SEC-2024-0106 Oracle Communications: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jan 16, 2024
- ELSA-2024-0125 Moderate: tomcat security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Jan 11, 2024
- WID-SEC-2023-2963 Trellix ePolicy Orchestrator: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 16, 2023
- ALAS2023-2023-415 Important: tomcat9 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Nov 3, 2023
References
- https://lists.apache.org/thread/2pv8yz1pyp088tsxfb7ogltk9msk0jdp vendor-advisory