Description
Improper Input Validation vulnerability in Apache Tomcat.Tomcat from 11.0.0-M1 through 11.0.0-M10, from 10.1.0-M1 through 10.1.15, from 9.0.0-M1 through 9.0.82 and from 8.5.0 through 8.5.95 did not correctly parse HTTP trailer headers. A trailer header that exceeded the header size limit 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-M11 onwards, 10.1.16 onwards, 9.0.83 onwards or 8.5.96 onwards, which fix the issue.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Apache Software Foundation | Apache Tomcat | 11.0.0-M1 – ≤ 11.0.0-M10, 10.1.0-M1 – ≤ 10.1.15, 9.0.0-M1 – ≤ 9.0.82, 8.5.0 – ≤ 8.5.95 | — |
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 | 10.1.16-1 | — |
| Debian 14 | tomcat9 | 9.0.70-2 | — |
| Debian 13 | tomcat10 | 10.1.16-1 | — |
| Debian 13 | tomcat9 | 9.0.70-2 | — |
| Debian 12 | tomcat10 | 10.1.6-1+deb12u2 | DSA-5665-1 |
| Debian 12 | tomcat9 | 9.0.70-2 | — |
| Debian 11 | tomcat9 | 9.0.43-2~deb11u10 | DSA-5667-1 |
| Debian 10 | tomcat9 | 9.0.31-1~deb10u11 | DLA-3707-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 25.10 | tomcat9 | 9.0.70-2ubuntu1.1 | — |
| Ubuntu 24.04 LTS | tomcat9 | 9.0.70-2ubuntu0.1 | USN-7032-1 |
| Ubuntu 20.04 LTS | tomcat9 | 9.0.31-1ubuntu0.7 | USN-7032-1 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 22.04 LTS | tomcat9 | 9.0.58-1ubuntu0.1+esm3 | USN-7032-1 |
| Ubuntu Pro 18.04 LTS | tomcat8 | 8.5.39-1ubuntu1~18.04.3+esm3 | USN-7032-1 |
| Ubuntu Pro 18.04 LTS | tomcat9 | 9.0.16-3ubuntu0.18.04.2+esm3 | USN-7032-1 |
| Ubuntu Pro 16.04 LTS | tomcat7 | 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_3.2 | RHSA-2024:1134 |
| RHEL 8 | tomcat +7 | 1:9.0.62-27.el8_9.3 | RHSA-2024:0539 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9.2 EUS | tomcat +7 | 1:9.0.62-11.el9_2.4 | RHSA-2024:1092 |
| RHEL 8.8 EUS | tomcat +7 | 1:9.0.62-5.el8_8.3 | RHSA-2024:0532 |
| Red Hat JBoss Web Server 6 | jws6-tomcat +9 | 10.1.8-6.redhat_00013.1.el8jws | RHSA-2024:1324 |
| Red Hat JBoss Web Server 5 | jws5-tomcat +11 | 9.0.62-41.redhat_00020.1.el7jws | RHSA-2024:1318 |
| Red Hat JBoss Web Server 5 | jws5-tomcat-native | 1.2.31-17.redhat_17.el7jws | RHSA-2024:1318 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 9 | tomcat +7 | 1:9.0.62-37.el9_3.2 | ALSA-2024:1134 |
| AlmaLinux 8 | tomcat +7 | 1:9.0.62-27.el8_9.3 | ALSA-2024:0539 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | tomcat | 1:9.0.62-27.el8_9.3 | RLSA-2024:0539 |
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 SP5 | tomcat10 | 10.1.18-150200.5.8.1 | SUSE-SU-2024:0208-1 |
| 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 | 9.0.36-150100.4.105.1 | SUSE-SU-2024:0209-1 |
Show 12 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP5 | tomcat | 9.0.36-3.118.1 | SUSE-SU-2026:1058-1, SUSE-SU-2024:0206-1 |
| 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 | 9.0.36-150100.4.105.1 | SUSE-SU-2024:0209-1 |
| SLES for SAP 12 SP5 | tomcat | 9.0.36-3.118.1 | SUSE-SU-2024:0206-1 |
| 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 | 9.0.36-150100.4.105.1 | SUSE-SU-2024:0209-1 |
| 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 | 9.0.85-1.1 | openSUSE-SU-2024:13590-1 |
| openSUSE Tumbleweed | tomcat10 | 10.1.18-1.1 | openSUSE-SU-2024:13596-1 |
| openSUSE Leap 15.5 | tomcat | 9.0.85-150200.57.1 | SUSE-SU-2024:0472-1 |
| openSUSE Leap 15.5 | tomcat10 | 10.1.18-150200.5.8.1 | SUSE-SU-2024:0208-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | tomcat9 +7 | 1:9.0.82-1.amzn2023.0.2 | ALAS2023-2024-471 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | tomcat +7 | 1:9.0.62-37.el9_3.2 | ELSA-2024-1134 |
| Oracle Linux 8 | tomcat +7 | 1:9.0.62-27.el8_9.3 | ELSA-2024-0539 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Maven | org.apache.tomcat:tomcat-catalina | >= 11.0.0-M1, < 11.0.0-M11 | 11.0.0-M11 | GHSA-fccv-jmmp-qg76 |
| Maven | org.apache.tomcat:tomcat-catalina | >= 10.1.0-M1, < 10.1.16 | 10.1.16 | GHSA-fccv-jmmp-qg76 |
| Maven | org.apache.tomcat:tomcat-catalina | >= 9.0.0-M1, < 9.0.83 | 9.0.83 | GHSA-fccv-jmmp-qg76 |
| Maven | org.apache.tomcat:tomcat-catalina | >= 8.5.0, < 8.5.96 | 8.5.96 | GHSA-fccv-jmmp-qg76 |
| Maven | org.apache.tomcat:tomcat-coyote | >= 11.0.0-M1, < 11.0.0-M11 | 11.0.0-M11 | GHSA-fccv-jmmp-qg76 |
| Maven | org.apache.tomcat.embed:tomcat-embed-core | >= 11.0.0-M1, < 11.0.0-M11 | 11.0.0-M11 | GHSA-fccv-jmmp-qg76 |
| Maven | org.apache.tomcat.embed:tomcat-embed-core | >= 10.1.0-M1, < 10.1.16 | 10.1.16 | GHSA-fccv-jmmp-qg76 |
| Maven | org.apache.tomcat.embed:tomcat-embed-core | >= 9.0.0-M1, < 9.0.83 | 9.0.83 | GHSA-fccv-jmmp-qg76 |
| Maven | org.apache.tomcat.embed:tomcat-embed-core | >= 8.5.0, < 8.5.96 | 8.5.96 | GHSA-fccv-jmmp-qg76 |
Advisories 49
- ALSA-2024:1134 Important: tomcat security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2024:0539 Important: 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-2024:1318 Red Hat Security Advisory: Red Hat JBoss Web Server 5.7.8 release and security update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2024:1324 Red Hat Security Advisory: Red Hat JBoss Web Server 6.0.1 release and security update Red Hat Security Advisories (RHSA) · Oct 13, 2026
- RHSA-2024:1134 Red Hat Security Advisory: tomcat security update Red Hat Security Advisories (RHSA) · Sep 28, 2026
- RHSA-2024:1092 Red Hat Security Advisory: tomcat security update Red Hat Security Advisories (RHSA) · Sep 28, 2026
- RHSA-2024:0539 Red Hat Security Advisory: tomcat security update Red Hat Security Advisories (RHSA) · Sep 28, 2026
- RHSA-2024:0532 Red Hat Security Advisory: tomcat security update Red Hat Security Advisories (RHSA) · Sep 28, 2026
- USN-7032-1 tomcat8, tomcat9 vulnerability Ubuntu Security Notices (USN) · Apr 27, 2026
- SUSE-SU-2026:1058-1 Security update for tomcat SUSE / openSUSE Security Updates · Mar 27, 2026
- WID-SEC-2023-3020 Apache Tomcat: Schwachstelle ermöglicht Umgehen von Sicherheitsvorkehrungen BSI CERT-Bund (WID) · Mar 26, 2026
- DSA-5667-1 tomcat9 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-5665-1 tomcat10 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-3707-1 tomcat9 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- RLSA-2024:0539 Important: tomcat security update Rocky Linux Security Advisories · Feb 5, 2026
- SUSE-SU-2024:0208-1 Security update for tomcat10 SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:13596-1 tomcat10-10.1.18-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:0472-1 Security update for tomcat SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:13590-1 tomcat-9.0.85-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:0206-1 Security update for tomcat SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:0209-1 Security update for tomcat SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2024-0869 Oracle Communications: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 10, 2025
- WID-SEC-2024-0899 Oracle Fusion Middleware: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jun 9, 2025
- NCSC-2025-0123 Kwetsbaarheden verholpen in Oracle Database Producten NCSC-NL (Netherlands) · Apr 16, 2025
- WID-SEC-2025-0810 Oracle Retail Applications: Mehrere Schwachstellen BSI CERT-Bund (WID) · Apr 15, 2025
- WID-SEC-2024-0119 Oracle MySQL: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 21, 2024
- WID-SEC-2024-1248 Xerox FreeFlow Print Server: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 21, 2024
- WID-SEC-2024-1642 Oracle Communications: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 20, 2024
- WID-SEC-2024-0769 IBM Rational Build Forge: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 7, 2024
- 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
- NCSC-2024-0306 Kwetsbaarheden verholpen in Oracle Supply Chain NCSC-NL (Netherlands) · Jul 17, 2024
- NCSC-2024-0305 Kwetsbaarheden verholpen in Oracle Siebel CRM NCSC-NL (Netherlands) · Jul 17, 2024
- NCSC-2024-0299 Kwetsbaarheden verholpen in Oracle Analytics NCSC-NL (Netherlands) · Jul 17, 2024
- NCSC-2024-0294 Kwetsbaarheden verholpen in Oracle Communications NCSC-NL (Netherlands) · Jul 17, 2024
- WID-SEC-2024-1653 Oracle Siebel CRM: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jul 16, 2024
- WID-SEC-2024-1652 Oracle Supply Chain: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jul 16, 2024
- WID-SEC-2024-1238 HPE HP-UX: Mehrere Schwachstellen BSI CERT-Bund (WID) · May 27, 2024
- WID-SEC-2024-0890 Oracle Supply Chain: Mehrere Schwachstellen BSI CERT-Bund (WID) · Apr 16, 2024
- WID-SEC-2024-0873 Oracle Financial Services Applications: Mehrere Schwachstellen BSI CERT-Bund (WID) · Apr 16, 2024
- ELSA-2024-1134 Important: tomcat security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Mar 7, 2024
- WID-SEC-2024-0101 Atlassian Bitbucket: Mehrere Schwachstellen BSI CERT-Bund (WID) · Feb 20, 2024
- ELSA-2024-0539 Important: tomcat security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Jan 29, 2024
- WID-SEC-2024-0108 Oracle Commerce: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jan 16, 2024
- WID-SEC-2024-0106 Oracle Communications: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jan 16, 2024
- WID-SEC-2024-0094 Atlassian Bamboo: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jan 15, 2024
- ALAS2023-2024-471 Moderate: tomcat9 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Jan 8, 2024