Description
Apache Tomcat 10.0.0-M1 to 10.0.6, 9.0.0.M1 to 9.0.46 and 8.5.0 to 8.5.66 did not correctly parse the HTTP transfer-encoding request header in some circumstances leading to the possibility to request smuggling when used with a reverse proxy. Specifically: - Tomcat incorrectly ignored the transfer encoding header if the client declared it would only accept an HTTP/1.0 response; - Tomcat honoured the identify encoding; and - Tomcat did not ensure that, if present, the chunked encoding was the final encoding.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Apache Software Foundation | Apache Tomcat | Apache Tomcat 10 10.0.0-M1 to 10.0.6, Apache Tomcat 9 9.0.0.M1 to 9.0.46, Apache Tomcat 8 8.5.0 to 8.5.66 | — |
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 | 9.0.43-2 | — |
| Debian 13 | tomcat9 | 9.0.43-2 | — |
| Debian 12 | tomcat9 | 9.0.43-2 | — |
| Debian 10 | tomcat9 | 9.0.31-1~deb10u5 | DSA-4952-1 |
| Debian 9 | tomcat8 | 8.5.54-0+deb9u7 | DLA-2733-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | tomcat9 | 9.0.31-1ubuntu0.2 | USN-5360-1 |
| Ubuntu 18.04 LTS | tomcat9 | 9.0.16-3ubuntu0.18.04.2 | USN-5360-1 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 18.04 LTS | tomcat8 | No fix yet | — |
| 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 |
|---|---|---|---|
| Red Hat JBoss Web Server 5 | jws5-tomcat +11 | 9.0.50-3.redhat_00004.1.el7jws | RHSA-2021:4861 |
| Red Hat JBoss Web Server 5 | jws5-tomcat-native | 1.2.30-3.redhat_3.el7jws | RHSA-2021:4861 |
| Red Hat JBoss Web Server 5 | jws5-tomcat-vault +1 | 1.1.8-4.Final_redhat_00004.1.el7jws | RHSA-2021:4861 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP3 | tomcat | 9.0.36-13.1 | SUSE-SU-2021:3672-1 |
| SLES 15 SP2 | tomcat | 9.0.36-13.1 | SUSE-SU-2021:3672-1 |
| SLES 15 SP1 | tomcat | 9.0.36-4.63.1 | SUSE-SU-2021:3669-1 |
| SLES 15 | tomcat | 9.0.36-3.84.1 | SUSE-SU-2021:3670-1 |
| SLES 12 SP5 | javapackages-tools | 2.0.1-13.1 | SUSE-SU-2021:3602-1 |
| SLES 12 SP5 | tomcat | 9.0.36-3.71.1 | SUSE-SU-2026:1058-1, SUSE-SU-2021:3602-1 |
Show 10 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP4 | javapackages-tools | 2.0.1-13.1 | SUSE-SU-2021:3602-1 |
| SLES 12 SP4 | tomcat | 9.0.36-3.71.1 | SUSE-SU-2021:3602-1 |
| SLES for SAP 15 SP1 | tomcat | 9.0.36-4.63.1 | SUSE-SU-2021:3669-1 |
| SLES for SAP 15 | tomcat | 9.0.36-3.84.1 | SUSE-SU-2021:3670-1 |
| SLES for SAP 12 SP5 | javapackages-tools | 2.0.1-13.1 | SUSE-SU-2021:3602-1 |
| SLES for SAP 12 SP5 | tomcat | 9.0.36-3.71.1 | SUSE-SU-2021:3602-1 |
| SLES for SAP 12 SP4 | javapackages-tools | 2.0.1-13.1 | SUSE-SU-2021:3602-1 |
| SLES for SAP 12 SP4 | tomcat | 9.0.36-3.71.1 | SUSE-SU-2021:3602-1 |
| SLE HPC 15 SP1 | tomcat | 9.0.36-4.63.1 | SUSE-SU-2021:3669-1 |
| SLE HPC 15 | tomcat | 9.0.36-3.84.1 | SUSE-SU-2021:3670-1 |
| SUSE OpenStack Cloud Crowbar 9 | javapackages-tools | 2.0.1-13.1 | SUSE-SU-2021:3602-1 |
| SUSE OpenStack Cloud Crowbar 9 | tomcat | 9.0.36-3.71.1 | SUSE-SU-2021:3602-1 |
| SUSE OpenStack Cloud 9 | javapackages-tools | 2.0.1-13.1 | SUSE-SU-2021:3602-1 |
| SUSE OpenStack Cloud 9 | tomcat | 9.0.36-3.71.1 | SUSE-SU-2021:3602-1 |
| SUSE Enterprise Storage 6 | tomcat | 9.0.36-4.63.1 | SUSE-SU-2021:3669-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | tomcat | 9.0.43-2.1 | openSUSE-SU-2024:11618-1 |
| openSUSE Tumbleweed | tomcat10 | 10.1.14-1.1 | openSUSE-SU-2024:13441-1 |
| openSUSE Leap 15.3 | tomcat | 9.0.36-13.1 | openSUSE-SU-2021:3672-1 |
| openSUSE Leap 15.2 | tomcat | 9.0.36-lp152.2.25.1 | openSUSE-SU-2021:1490-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | tomcat9 +7 | 1:9.0.64-1.amzn2023.0.2 | ALAS2023-2023-059 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Maven | org.apache.tomcat:tomcat | >= 10.0.0-M1, < 10.0.7 | 10.0.7 | GHSA-4vww-mc66-62m6 |
| Maven | org.apache.tomcat:tomcat | >= 9.0.0-M1, < 9.0.48 | 9.0.48 | GHSA-4vww-mc66-62m6 |
| Maven | org.apache.tomcat:tomcat | >= 8.5.0, < 8.5.68 | 8.5.68 | GHSA-4vww-mc66-62m6 |
Advisories 21
- RHSA-2021:4861 Red Hat Security Advisory: Red Hat JBoss Web Server 5.6.0 Security release Red Hat Security Advisories (RHSA) · Oct 2, 2026
- WID-SEC-2022-0607 Red Hat FUSE: Mehrere Schwachstellen BSI CERT-Bund (WID) · Aug 9, 2026
- USN-5360-1 tomcat9 vulnerabilities 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-2022-1116 Apache Tomcat: Mehrere Schwachstellen BSI CERT-Bund (WID) · Mar 26, 2026
- DSA-4952-1 tomcat9 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2733-1 tomcat8 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2021:3602-1 Security update for tomcat SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:1490-1 Security update for tomcat SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:3672-1 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-2024:11618-1 tomcat-9.0.43-2.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:3670-1 Security update for tomcat SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:3669-1 Security update for tomcat SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2022-1375 JFrog Artifactory: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 12, 2025
- SUSE-SU-2021:3672-1 Security update for tomcat SUSE / openSUSE Security Updates · May 2, 2025
- NCSC-2025-0123 Kwetsbaarheden verholpen in Oracle Database Producten NCSC-NL (Netherlands) · Apr 16, 2025
- WID-SEC-2024-2180 Oracle Fusion Middleware: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 18, 2024
- WID-SEC-2024-1238 HPE HP-UX: Mehrere Schwachstellen BSI CERT-Bund (WID) · May 27, 2024
- WID-SEC-2024-0528 Dell Data Protection Advisor: Mehrere Schwachstellen BSI CERT-Bund (WID) · Feb 29, 2024
- ALAS2023-2023-059 Moderate: tomcat9 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Feb 15, 2024
References
- https://lists.apache.org/thread.html/r612a79269b0d5e5780c62dfd34286a8037232fec0bc6f1a7e60c9381%40%3Cannounce.tomcat.apache.org%3E
- https://www.oracle.com//security-alerts/cpujul2021.html
- [tomee-commits] 20210728 [jira] [Created] (TOMEE-3778) Update embedded Tomcat to 9.0.48 or later to address CVE-2021-33037 mailing-list
- [tomee-commits] 20210728 [jira] [Commented] (TOMEE-3778) Update embedded Tomcat to 9.0.48 or later to address CVE-2021-33037 mailing-list
- [debian-lts-announce] 20210805 [SECURITY] [DLA 2733-1] tomcat8 security update mailing-list
- DSA-4952 vendor-advisory
- [tomee-commits] 20210830 [jira] [Commented] (TOMEE-3778) Update embedded Tomcat to 9.0.48 or later to address CVE-2021-33037 mailing-list
- [tomee-commits] 20210913 [jira] [Commented] (TOMEE-3778) Update embedded Tomcat to 9.0.48 or later to address CVE-2021-33037 mailing-list
- [tomee-commits] 20210914 [jira] [Commented] (TOMEE-3778) Update embedded Tomcat to 9.0.48 or later to address CVE-2021-33037 mailing-list
- [tomee-commits] 20210916 [jira] [Resolved] (TOMEE-3778) Update embedded Tomcat to 9.0.48 or later to address CVE-2021-33037 mailing-list
- https://www.oracle.com/security-alerts/cpuoct2021.html
- https://security.netapp.com/advisory/ntap-20210827-0007/
- https://kc.mcafee.com/corporate/index?page=content&id=SB10366
- https://www.oracle.com/security-alerts/cpujan2022.html
- https://www.oracle.com/security-alerts/cpuapr2022.html
- GLSA-202208-34 vendor-advisory