Description
Race condition within a thread vulnerability in Apache Tomcat Native allowed client certificate verification requirements to be down-graded for some configurations.
This issue affects Apache Tomcat Native: from 2.0.0 through 2.0.15, from 1.3.0 through 1.3.8. Unsupported versions may also be affected.
Users are recommended to upgrade to version 2.0.16 or 1.3.9, which fixes the issue.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Apache Software Foundation | Apache Tomcat Native | 2.0.0 – ≤ 2.0.15, 1.3.0 – ≤ 1.3.8 | — |
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 | tomcat-native | 2.0.16-1 | — |
| Debian 13 | tomcat-native | No fix yet | — |
| Debian 12 | tomcat-native | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | tomcat-native | No fix yet | — |
| Ubuntu 26.04 LTS | tomcat-native | No fix yet | — |
| Ubuntu 24.04 LTS | tomcat-native | No fix yet | — |
| Ubuntu 22.04 LTS | tomcat-native | No fix yet | — |
| Ubuntu 20.04 LTS | tomcat-native | No fix yet | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | tomcat-native | No fix yet | — |
| Ubuntu 16.04 LTS | tomcat-native | No fix yet | — |
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 | libtcnative-2-0 | 2.0.16-150400.9.6.1 | SUSE-SU-2026:4658-1 |
| 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 | libtcnative-2-0 | 2.0.16-150400.9.6.1 | SUSE-SU-2026:4658-1 |
| 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 | libtcnative-2-0 | 2.0.16-150400.9.6.1 | SUSE-SU-2026:4658-1 |
| 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 | libtcnative-2-0 | 2.0.16-150400.9.6.1 | SUSE-SU-2026:4658-1 |
| 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 | libtcnative-2-0 | 2.0.16-150400.9.6.1 | SUSE-SU-2026:4658-1 |
| 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 | libtcnative-2-0 | 2.0.16-150400.9.6.1 | SUSE-SU-2026:4658-1 |
| 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 | libtcnative-2-0 | 2.0.16-150400.9.6.1 | SUSE-SU-2026:4658-1 |
| 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 | libtcnative-2-0 | 2.0.16-150400.9.6.1 | SUSE-SU-2026:4658-1 |
| 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 | libtcnative-2-0 | 2.0.16-150400.9.6.1 | SUSE-SU-2026:4658-1 |
| 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 | libtcnative-1-0 | 1.3.9-1.1 | openSUSE-SU-2026:11898-1 |
| openSUSE Tumbleweed | libtcnative-2-0 | 2.0.16-1.1 | openSUSE-SU-2026:11899-1 |
| 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 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | tomcat-native | 2.0.16-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | tomcat-native | 2.0.16-1.amzn2023.0.1 | ALAS2023-2026-3167 |
| Amazon Linux 2 | tomcat-native | 1.2.38-2.amzn2 | ALAS2-2026-4016 |
Advisories 11
- WID-SEC-2026-3559 Apache Tomcat APR/native Connector: 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
- ALAS2-2026-4016 Important: tomcat-native security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Oct 26, 2026
- SUSE-SU-2026:4658-1 Security update for libtcnative-2-0 SUSE / openSUSE Security Updates · Oct 14, 2026
- ALAS2023-2026-3167 Important: tomcat-native security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Oct 12, 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-2026:11898-1 libtcnative-1-0-1.3.9-1.1 on GA media SUSE / openSUSE Security Updates · Sep 29, 2026
- openSUSE-SU-2026:11899-1 libtcnative-2-0-2.0.16-1.1 on GA media SUSE / openSUSE Security Updates · Sep 29, 2026
References
- https://lists.apache.org/thread/obsson6zhvfg0wsp2bx602l61ltj87r1 vendor-advisory