Description
The refactoring present in Apache Tomcat 9.0.28 to 9.0.30, 8.5.48 to 8.5.50 and 7.0.98 to 7.0.99 introduced a regression. The result of the regression was that invalid Transfer-Encoding headers were incorrectly processed leading to a possibility of HTTP Request Smuggling if Tomcat was located behind a reverse proxy that incorrectly handled the invalid Transfer-Encoding header in a particular manner. Such a reverse proxy is considered unlikely.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Apache | Apache Tomcat | Apache Tomcat 9.0.28 to 9.0.30, 8.5.48 to 8.5.50, 7.0.98 to 7.0.99 | — |
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 | 9.0.31-1 | — |
| Debian 13 | tomcat9 | 9.0.31-1 | — |
| Debian 12 | tomcat9 | 9.0.31-1 | — |
| Debian 10 | tomcat9 | 9.0.31-1~deb10u1 | DSA-4680-1 |
| Debian 9 | tomcat8 | 8.5.54-0+deb9u1 | DSA-4673-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 8 | tomcat7 | 7.0.56-3+really7.0.100-1 | DLA-2133-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat JBoss Web Server 5 | jws5-tomcat +9 | 9.0.30-3.redhat_4.1.el6jws | RHSA-2020:1520 |
| Red Hat JBoss Web Server 5 | jws5-tomcat-native | 1.2.23-4.redhat_4.el6jws | RHSA-2020:1520 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP1 | tomcat | 9.0.31-4.22.1 | SUSE-SU-2020:0631-1 |
| SLES 15 | tomcat | 9.0.31-3.42.2 | SUSE-SU-2020:0598-1 |
| SLES 12 SP5 | tomcat | 9.0.31-3.25.1 | SUSE-SU-2020:0632-1 |
| SLES 12 SP4 | tomcat | 9.0.31-3.25.1 | SUSE-SU-2020:0632-1 |
| SLES 12 SP3 | tomcat | 8.0.53-29.27.1 | SUSE-SU-2020:1498-1 |
Show 14 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP2 | tomcat | 8.0.53-29.27.1 | SUSE-SU-2020:1498-1 |
| SLES 12 SP1 | tomcat | 8.0.53-10.43.1 | SUSE-SU-2020:1497-1 |
| SLES for SAP 15 | tomcat | 9.0.31-3.42.2 | SUSE-SU-2020:0598-1 |
| SLES for SAP 12 SP5 | tomcat | 9.0.31-3.25.1 | SUSE-SU-2020:0632-1 |
| SLES for SAP 12 SP4 | tomcat | 9.0.31-3.25.1 | SUSE-SU-2020:0632-1 |
| SLES for SAP 12 SP3 | tomcat | 8.0.53-29.27.1 | SUSE-SU-2020:1498-1 |
| SLES for SAP 12 SP2 | tomcat | 8.0.53-29.27.1 | SUSE-SU-2020:1498-1 |
| SLES for SAP 12 SP1 | tomcat | 8.0.53-10.43.1 | SUSE-SU-2020:1497-1 |
| SLE HPC 15 | tomcat | 9.0.31-3.42.2 | SUSE-SU-2020:0598-1 |
| SUSE OpenStack Cloud Crowbar 8 | tomcat | 8.0.53-29.27.1 | SUSE-SU-2020:1498-1 |
| SUSE OpenStack Cloud 8 | tomcat | 8.0.53-29.27.1 | SUSE-SU-2020:1498-1 |
| SUSE OpenStack Cloud 7 | tomcat | 8.0.53-29.27.1 | SUSE-SU-2020:1498-1 |
| SUSE HPE Helion OpenStack 8 | tomcat | 8.0.53-29.27.1 | SUSE-SU-2020:1498-1 |
| SUSE Enterprise Storage 5 | tomcat | 8.0.53-29.27.1 | SUSE-SU-2020:1498-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | tomcat | 9.0.36-8.4 | openSUSE-SU-2024:11468-1 |
| openSUSE Tumbleweed | tomcat10 | 10.1.14-1.1 | openSUSE-SU-2024:13441-1 |
| openSUSE Leap 15.1 | tomcat | 9.0.31-lp151.3.12.1 | openSUSE-SU-2020:0345-1 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Maven | org.apache.tomcat:tomcat | >= 7.0.98, < 7.0.100 | 7.0.100 | GHSA-767j-jfh2-jvrc |
| Maven | org.apache.tomcat:tomcat | >= 8.5.48, < 8.5.51 | 8.5.51 | GHSA-767j-jfh2-jvrc |
| Maven | org.apache.tomcat:tomcat | >= 9.0.28, < 9.0.31 | 9.0.31 | GHSA-767j-jfh2-jvrc |
| Maven | org.apache.tomcat.embed:tomcat-embed-core | >= 7.0.98, < 7.0.100 | 7.0.100 | GHSA-767j-jfh2-jvrc |
| Maven | org.apache.tomcat.embed:tomcat-embed-core | >= 8.5.48, < 8.5.51 | 8.5.51 | GHSA-767j-jfh2-jvrc |
| Maven | org.apache.tomcat.embed:tomcat-embed-core | >= 9.0.28, < 9.0.31 | 9.0.31 | GHSA-767j-jfh2-jvrc |
Advisories 13
- RHSA-2020:1520 Red Hat Security Advisory: Red Hat JBoss Web Server 5.3 release Red Hat Security Advisories (RHSA) · Aug 5, 2026
- DSA-4673-1 tomcat8 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-4680-1 tomcat9 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2133-1 tomcat7 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2020:0632-1 Security update for tomcat SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:11468-1 tomcat-9.0.36-8.4 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:0598-1 Security update for tomcat SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:1497-1 Security update for tomcat SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:1498-1 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-2020:0345-1 Security update for tomcat SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:0631-1 Security update for tomcat SUSE / openSUSE Security Updates · May 2, 2025
- WID-SEC-2023-2130 Apache Tomcat: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 27, 2023
References
- [tomcat-announce] 20200224 [SECURITY] CVE-2019-17569 HTTP Request Smuggling mailing-list
- [debian-lts-announce] 20200304 [SECURITY] [DLA 2133-1] tomcat7 security update mailing-list
- openSUSE-SU-2020:0345 vendor-advisory
- [tomee-commits] 20200320 [jira] [Created] (TOMEE-2790) TomEE plus(7.0.7) is affected by CVE-2020-1935 & CVE-2019-17569 vulnerabilities mailing-list
- [tomee-commits] 20200323 [jira] [Commented] (TOMEE-2790) TomEE plus(7.0.7) is affected by CVE-2020-1935 & CVE-2019-17569 vulnerabilities mailing-list
- DSA-4673 vendor-advisory
- DSA-4680 vendor-advisory
- https://www.oracle.com/security-alerts/cpujul2020.html
- https://security.netapp.com/advisory/ntap-20200327-0005/
- https://www.oracle.com/security-alerts/cpuoct2020.html
- https://www.oracle.com/security-alerts/cpujan2021.html