Description
Incomplete cleanup vulnerability in Apache Tomcat allows a malformed request to potentially (depends on timing) cause one request from another user to fail.
This issue affects Apache Tomcat: from 11.0.19 through 11.0.25, from 10.1.53 through 10.1.59, from 9.0.116 through 9.0.121.
Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Apache Software Foundation | Apache Tomcat | 11.0.19 – ≤ 11.0.25, 10.1.53 – ≤ 10.1.59, 9.0.116 – ≤ 9.0.121 | — |
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 | 10.1.60-1 | — |
| Debian 14 | tomcat11 | No fix yet | — |
| Debian 14 | tomcat9 | 9.0.70-2 | — |
| Debian 13 | tomcat10 +1 | No fix yet | — |
| Debian 13 | tomcat9 | 9.0.70-2 | — |
| Debian 12 | tomcat10 | No fix yet | — |
| Debian 12 | tomcat9 | 9.0.70-2 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | tomcat9 +2 | No fix yet | — |
| Ubuntu 26.04 LTS | tomcat9 +2 | No fix yet | — |
| Ubuntu 24.04 LTS | tomcat9 +1 | No fix yet | — |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 22.04 LTS | tomcat9 | No fix yet | — |
| Ubuntu Pro 20.04 LTS | tomcat9 | No fix yet | — |
| Ubuntu Pro 18.04 LTS | tomcat8 +1 | 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 Hardened Images 1 | tomcat10 +9 | 10.1.60-0.1.hum1 | RHSA-2026:68257 |
| Red Hat Hardened Images 1 | tomcat11 +9 | 11.0.26-0.1.hum1 | RHSA-2026:68258 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | libtcnative-1-0 | 1.3.9-150600.16.9.2 | SUSE-SU-2026:4544-1 |
| SLES 15 SP7 | tomcat | 9.0.122-150200.123.2 | SUSE-SU-2026:4546-1 |
| SLES 15 SP7 | tomcat10 | 10.1.60-150200.5.82.2 | SUSE-SU-2026:4546-1 |
| SLES 15 SP7 | tomcat11 | 11.0.26-150600.13.36.2 | SUSE-SU-2026:4544-1 |
| SLES 15 SP6 | libtcnative-1-0 | 1.3.9-150600.16.9.2 | SUSE-SU-2026:4544-1 |
| SLES 15 SP6 | tomcat | 9.0.122-150200.123.2 | SUSE-SU-2026:4546-1 |
| SLES 15 SP6 | tomcat10 | 10.1.60-150200.5.82.2 | SUSE-SU-2026:4546-1 |
| SLES 15 SP6 | tomcat11 | 11.0.26-150600.13.36.2 | SUSE-SU-2026:4544-1 |
| SLES 15 SP5 | libtcnative-1-0 | 1.3.9-150200.6.11.2 | SUSE-SU-2026:4546-1 |
| SLES 15 SP5 | tomcat | 9.0.122-150200.123.2 | SUSE-SU-2026:4546-1 |
| SLES 15 SP5 | tomcat10 | 10.1.60-150200.5.82.2 | SUSE-SU-2026:4546-1 |
| SLES 15 SP4 | libtcnative-1-0 | 1.3.9-150200.6.11.2 | SUSE-SU-2026:4546-1 |
| SLES 15 SP4 | tomcat | 9.0.122-150200.123.2 | SUSE-SU-2026:4546-1 |
| SLES 12 SP5 | libapr1 | 1.6.5-4.13.1 | SUSE-SU-2026:4927-1 |
| SLES 12 SP5 | libtcnative-1-0 | 1.3.9-3.9.1 | SUSE-SU-2026:4927-1 |
| SLES 12 SP5 | tomcat | 9.0.123-3.182.2 | SUSE-SU-2026:4927-1 |
Show 7 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | libtcnative-1-0 | 1.3.9-160000.1.1 | SUSE-SU-2026:23985-1 |
| SLES for SAP 16.0 | libtcnative-2-0 | 2.0.16-160000.1.1 | SUSE-SU-2026:23985-1 |
| SLES for SAP 16.0 | tomcat | 9.0.122-160000.1.1 | SUSE-SU-2026:23985-1 |
| SLES for SAP 16.0 | tomcat10 | 10.1.60-160000.1.1 | SUSE-SU-2026:23985-1 |
| SLES for SAP 16.0 | tomcat11 | 11.0.26-160000.1.1 | SUSE-SU-2026:23985-1 |
| SLES for SAP 15 SP6 | libtcnative-1-0 | 1.3.9-150600.16.9.2 | SUSE-SU-2026:4544-1 |
| SLES for SAP 15 SP6 | tomcat | 9.0.122-150200.123.2 | SUSE-SU-2026:4546-1 |
| SLES for SAP 15 SP6 | tomcat10 | 10.1.60-150200.5.82.2 | SUSE-SU-2026:4546-1 |
| SLES for SAP 15 SP6 | tomcat11 | 11.0.26-150600.13.36.2 | SUSE-SU-2026:4544-1 |
| SLES for SAP 15 SP5 | libtcnative-1-0 | 1.3.9-150200.6.11.2 | SUSE-SU-2026:4546-1 |
| SLES for SAP 15 SP5 | tomcat | 9.0.122-150200.123.2 | SUSE-SU-2026:4546-1 |
| SLES for SAP 15 SP5 | tomcat10 | 10.1.60-150200.5.82.2 | SUSE-SU-2026:4546-1 |
| SLES for SAP 15 SP4 | libtcnative-1-0 | 1.3.9-150200.6.11.2 | SUSE-SU-2026:4546-1 |
| SLES for SAP 15 SP4 | tomcat | 9.0.122-150200.123.2 | SUSE-SU-2026:4546-1 |
| SLES 16.0 | libtcnative-1-0 | 1.3.9-160000.1.1 | SUSE-SU-2026:23985-1 |
| SLES 16.0 | libtcnative-2-0 | 2.0.16-160000.1.1 | SUSE-SU-2026:23985-1 |
| SLES 16.0 | tomcat | 9.0.122-160000.1.1 | SUSE-SU-2026:23985-1 |
| SLES 16.0 | tomcat10 | 10.1.60-160000.1.1 | SUSE-SU-2026:23985-1 |
| SLES 16.0 | tomcat11 | 11.0.26-160000.1.1 | SUSE-SU-2026:23985-1 |
| SLE HPC 15 SP5 | libtcnative-1-0 | 1.3.9-150200.6.11.2 | SUSE-SU-2026:4546-1 |
| SLE HPC 15 SP5 | tomcat | 9.0.122-150200.123.2 | SUSE-SU-2026:4546-1 |
| SLE HPC 15 SP5 | tomcat10 | 10.1.60-150200.5.82.2 | SUSE-SU-2026:4546-1 |
| SLE HPC 15 SP4 | libtcnative-1-0 | 1.3.9-150200.6.11.2 | SUSE-SU-2026:4546-1 |
| SLE HPC 15 SP4 | tomcat | 9.0.122-150200.123.2 | SUSE-SU-2026:4546-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | tomcat | 9.0.122-1.1 | openSUSE-SU-2026:11906-1 |
| openSUSE Tumbleweed | tomcat10 | 10.1.60-1.1 | openSUSE-SU-2026:11907-1 |
| openSUSE Tumbleweed | tomcat11 | 11.0.26-1.1 | openSUSE-SU-2026:11908-1 |
| openSUSE Leap 16.0 | libtcnative-1-0 | 1.3.9-160000.1.1 | openSUSE-SU-2026:21984-1 |
| openSUSE Leap 16.0 | libtcnative-2-0 | 2.0.16-160000.1.1 | openSUSE-SU-2026:21984-1 |
| openSUSE Leap 16.0 | tomcat | 9.0.122-160000.1.1 | openSUSE-SU-2026:21984-1 |
| openSUSE Leap 16.0 | tomcat10 | 10.1.60-160000.1.1 | openSUSE-SU-2026:21984-1 |
| openSUSE Leap 16.0 | tomcat11 | 11.0.26-160000.1.1 | openSUSE-SU-2026:21984-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | tomcat10 +7 | 1:10.1.60-1.amzn2023.0.1 | ALAS2023-2026-3165 |
| Amazon Linux 2023 | tomcat11 +7 | 1:11.0.26-1.amzn2023.0.1 | ALAS2023-2026-3151 |
| Amazon Linux 2023 | tomcat9 +7 | 1:9.0.122-1.amzn2023.0.1 | ALAS2023-2026-3166 |
Advisories 14
- WID-SEC-2026-3527 Apache Tomcat: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 9, 2026
- SUSE-SU-2026:4927-1 Security update for libapr1, libtcnative-1-0, tomcat SUSE / openSUSE Security Updates · Oct 31, 2026
- ALAS2023-2026-3151 Important: tomcat11 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Oct 12, 2026
- ALAS2023-2026-3165 Important: tomcat10 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Oct 12, 2026
- ALAS2023-2026-3166 Important: tomcat9 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Oct 12, 2026
- RHSA-2026:68258 Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update Red Hat Security Advisories (RHSA) · Oct 10, 2026
- RHSA-2026:68257 Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update Red Hat Security Advisories (RHSA) · Oct 10, 2026
- SUSE-SU-2026:4544-1 Security update for libtcnative-1-0, tomcat11 SUSE / openSUSE Security Updates · Oct 7, 2026
- SUSE-SU-2026:4546-1 Security update for libtcnative-1-0, tomcat, tomcat10 SUSE / openSUSE Security Updates · Oct 7, 2026
- SUSE-SU-2026:23985-1 Security update for libtcnative-1-0, libtcnative-2-0, tomcat, tomcat10, tomcat11 SUSE / openSUSE Security Updates · Oct 6, 2026
- openSUSE-SU-2026:21984-1 Security update for libtcnative-1-0, libtcnative-2-0, tomcat, tomcat10, tomcat11 SUSE / openSUSE Security Updates · Oct 1, 2026
- openSUSE-SU-2026:11906-1 tomcat-9.0.122-1.1 on GA media SUSE / openSUSE Security Updates · Sep 29, 2026
- openSUSE-SU-2026:11907-1 tomcat10-10.1.60-1.1 on GA media SUSE / openSUSE Security Updates · Sep 29, 2026
- openSUSE-SU-2026:11908-1 tomcat11-11.0.26-1.1 on GA media SUSE / openSUSE Security Updates · Sep 29, 2026
References
- https://lists.apache.org/thread/qkmsos3s8chn5053qr466rzwv6sk5gjg vendor-advisory