Description
If Apache Tomcat 8.5.0 to 8.5.82, 9.0.0-M1 to 9.0.67, 10.0.0-M1 to 10.0.26 or 10.1.0-M1 to 10.1.0 was configured to ignore invalid HTTP headers via setting rejectIllegalHeader to false (the default for 8.5.x only), Tomcat did not reject a request containing an invalid Content-Length header making a request smuggling attack possible if Tomcat was located behind a reverse proxy that also failed to reject the request with the invalid header.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Apache Software Foundation | Apache Tomcat | 10.1.0-M1 – ≤ 10.1.0, 10.0.0-M1 – ≤ 10.0.26, 9.0.0-M1 – ≤ 9.0.67, 8.5.0 – ≤ 8.5.82 | — |
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 | tomcat9 | 9.0.68-1 | — |
| Debian 13 | tomcat9 | 9.0.68-1 | — |
| Debian 12 | tomcat9 | 9.0.68-1 | — |
| Debian 11 | tomcat9 | 9.0.43-2~deb11u6 | DSA-5381-1 |
| Debian 10 | tomcat9 | 9.0.31-1~deb10u8 | DLA-3384-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | tomcat9 | 9.0.31-1ubuntu0.5 | USN-6880-1 |
Show 2 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+esm1 | USN-6880-1 |
| Ubuntu Pro 18.04 LTS | tomcat8 | 8.5.39-1ubuntu1~18.04.3+esm1 | USN-6880-1 |
| Ubuntu Pro 18.04 LTS | tomcat9 | 9.0.16-3ubuntu0.18.04.2+esm1 | USN-6880-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat JBoss Web Server 5 | jws5-tomcat +11 | 9.0.62-13.redhat_00011.1.el7jws | RHSA-2023:1663 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP1 | tomcat | 9.0.36-150100.4.81.1 | SUSE-SU-2022:4257-1 |
| SLES 15 | tomcat | 9.0.36-150000.3.101.2 | SUSE-SU-2022:4221-1 |
| SLES 12 SP5 | tomcat | 9.0.36-3.93.1 | SUSE-SU-2026:1058-1, SUSE-SU-2022:4303-1 |
| SLES 12 SP4 | tomcat | 9.0.36-3.93.1 | SUSE-SU-2022:4303-1 |
| SLES 12 SP3 | tomcat | 8.0.53-29.57.1 | SUSE-SU-2022:4193-1 |
Show 10 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP2 | tomcat | 8.0.53-29.57.1 | SUSE-SU-2022:4193-1 |
| SLES for SAP 15 SP1 | tomcat | 9.0.36-150100.4.81.1 | SUSE-SU-2022:4257-1 |
| SLES for SAP 15 | tomcat | 9.0.36-150000.3.101.2 | SUSE-SU-2022:4221-1 |
| SLES for SAP 12 SP5 | tomcat | 9.0.36-3.93.1 | SUSE-SU-2022:4303-1 |
| SLES for SAP 12 SP4 | tomcat | 9.0.36-3.93.1 | SUSE-SU-2022:4303-1 |
| SLE HPC 15 SP1 | tomcat | 9.0.36-150100.4.81.1 | SUSE-SU-2022:4257-1 |
| SLE HPC 15 | tomcat | 9.0.36-150000.3.101.2 | SUSE-SU-2022:4221-1 |
| SUSE OpenStack Cloud Crowbar 9 | tomcat | 9.0.36-3.93.1 | SUSE-SU-2022:4303-1 |
| SUSE OpenStack Cloud 9 | tomcat | 9.0.36-3.93.1 | SUSE-SU-2022:4303-1 |
| SUSE Enterprise Storage 6 | tomcat | 9.0.36-150100.4.81.1 | SUSE-SU-2022:4257-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | tomcat | 9.0.43-11.1 | openSUSE-SU-2024:12534-1 |
| openSUSE Tumbleweed | tomcat10 | 10.1.14-1.1 | openSUSE-SU-2024:13441-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | tomcat9 +7 | 1:9.0.71-1.amzn2023.0.1 | ALAS2023-2023-140 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Maven | org.apache.tomcat:tomcat-coyote | >= 9.0.0-M1, < 9.0.68 | 9.0.68 | GHSA-p22x-g9px-3945 |
| Maven | org.apache.tomcat:tomcat-coyote | >= 10.0.0-M1, < 10.0.27 | 10.0.27 | GHSA-p22x-g9px-3945 |
| Maven | org.apache.tomcat:tomcat-coyote | >= 10.1.0-M1, < 10.1.1 | 10.1.1 | GHSA-p22x-g9px-3945 |
| Maven | org.apache.tomcat.embed:tomcat-embed-core | >= 8.5.0, < 8.5.83 | 8.5.83 | GHSA-p22x-g9px-3945 |
| Maven | org.apache.tomcat.embed:tomcat-embed-core | >= 9.0.0-M1, < 9.0.68 | 9.0.68 | GHSA-p22x-g9px-3945 |
| Maven | org.apache.tomcat.embed:tomcat-embed-core | >= 10.0.0-M1, < 10.0.27 | 10.0.27 | GHSA-p22x-g9px-3945 |
| Maven | org.apache.tomcat.embed:tomcat-embed-core | >= 10.1.0-M1, < 10.1.1 | 10.1.1 | GHSA-p22x-g9px-3945 |
Advisories 26
- RHSA-2023:1663 Red Hat Security Advisory: Red Hat JBoss Web Server 5.7.2 release and security update Red Hat Security Advisories (RHSA) · Oct 2, 2026
- WID-SEC-2023-0126 Oracle MySQL: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jun 28, 2026
- USN-6880-1 Tomcat 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-2022-1918 Apache Tomcat: Schwachstelle ermöglicht Umgehen von Sicherheitsvorkehrungen BSI CERT-Bund (WID) · Mar 26, 2026
- DSA-5381-1 tomcat9 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-3384-1 tomcat9 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2022:4303-1 Security update for tomcat SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:4193-1 Security update for tomcat SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:4221-1 Security update for tomcat SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:4257-1 Security update for tomcat SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:13441-1 tomcat10-10.1.14-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:12534-1 tomcat-9.0.43-11.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2023-0138 Oracle Communications Applications: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jul 15, 2025
- NCSC-2025-0123 Kwetsbaarheden verholpen in Oracle Database Producten NCSC-NL (Netherlands) · Apr 16, 2025
- WID-SEC-2023-0137 Oracle Communications: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 21, 2024
- WID-SEC-2024-1238 HPE HP-UX: Mehrere Schwachstellen BSI CERT-Bund (WID) · May 27, 2024
- WID-SEC-2023-0809 IBM QRadar SIEM: Mehrere Schwachstellen BSI CERT-Bund (WID) · Feb 19, 2024
- WID-SEC-2023-2993 Atlassian Bamboo, Atlassian Bitbucket, Atlassian Confluence and Atlassian Jira Software: Mehrere Schwachstellen BSI CERT-Bund (WID) · Dec 12, 2023
- WID-SEC-2023-1021 Oracle Communications: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jun 29, 2023
- WID-SEC-2023-0561 Xerox FreeFlow Print Server: Mehrere Schwachstellen BSI CERT-Bund (WID) · May 18, 2023
- WID-SEC-2023-1030 Oracle Siebel CRM: Mehrere Schwachstellen BSI CERT-Bund (WID) · Apr 18, 2023
- WID-SEC-2023-1017 Oracle Financial Services Applications: Mehrere Schwachstellen BSI CERT-Bund (WID) · Apr 18, 2023
- ALAS2023-2023-140 Important: tomcat9 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Mar 22, 2023
- WID-SEC-2023-0133 Oracle Financial Services Applications: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jan 17, 2023
- WID-SEC-2023-0122 Oracle Supply Chain: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jan 17, 2023