CVE-2026-75973
Fixed in a distro release EPSS <1%CVSS 7.3
Improper Authentication vulnerability in Apache Tomcat. When Jakarta Authentication was configured with SimpleAuthConfigProvider as the default provider and multiple web application used that provider, the realm for the first web application to authenticate a request would be used for all web applications. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from 9.0.0.M4 through 9.0.121. The following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.0 through 8.5.100. Other unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.26, 10.1.60, 9.0.122, which fixes the issue.
Products: Apache Software Foundation Apache Tomcat
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Debian 12 | tomcat10 | no fix |
| Debian 12 | tomcat9 | 9.0.70-2 |
| Debian 13 | tomcat10 | no fix |
| Debian 13 | tomcat11 | no fix |
| Debian 13 | tomcat9 | 9.0.70-2 |
| Debian 14 | tomcat10 | 10.1.60-1 |
| Debian 14 | tomcat11 | no fix |
| Debian 14 | tomcat9 | 9.0.70-2 |
| Red Hat hummingbird 1 | tomcat10 | 0:10.1.60-0.1.hum1 |
| Red Hat hummingbird 1 | tomcat10-admin-webapps | 0:10.1.60-0.1.hum1 |
| Red Hat hummingbird 1 | tomcat10-common | 0:10.1.60-0.1.hum1 |
| Red Hat hummingbird 1 | tomcat10-docs-webapp | 0:10.1.60-0.1.hum1 |
| Red Hat hummingbird 1 | tomcat10-el-5.0-api | 0:10.1.60-0.1.hum1 |
| Red Hat hummingbird 1 | tomcat10-jsp-3.1-api | 0:10.1.60-0.1.hum1 |
| Red Hat hummingbird 1 | tomcat10-lib | 0:10.1.60-0.1.hum1 |
| Red Hat hummingbird 1 | tomcat10-servlet-6.0-api | 0:10.1.60-0.1.hum1 |
| Red Hat hummingbird 1 | tomcat10-user-instance | 0:10.1.60-0.1.hum1 |
| Red Hat hummingbird 1 | tomcat10-webapps | 0:10.1.60-0.1.hum1 |
| Red Hat hummingbird 1 | tomcat11 | 0:11.0.26-0.1.hum1 |
| Red Hat hummingbird 1 | tomcat11-admin-webapps | 0:11.0.26-0.1.hum1 |
| Red Hat hummingbird 1 | tomcat11-common | 0:11.0.26-0.1.hum1 |
| Red Hat hummingbird 1 | tomcat11-docs-webapp | 0:11.0.26-0.1.hum1 |
| Red Hat hummingbird 1 | tomcat11-el-6.0-api | 0:11.0.26-0.1.hum1 |
| Red Hat hummingbird 1 | tomcat11-jsp-4.0-api | 0:11.0.26-0.1.hum1 |
| Red Hat hummingbird 1 | tomcat11-lib | 0:11.0.26-0.1.hum1 |
| Red Hat hummingbird 1 | tomcat11-servlet-6.1-api | 0:11.0.26-0.1.hum1 |
| Red Hat hummingbird 1 | tomcat11-user-instance | 0:11.0.26-0.1.hum1 |
| Red Hat hummingbird 1 | tomcat11-webapps | 0:11.0.26-0.1.hum1 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | libtcnative-1-0 | 1.3.9-150200.6.11.2 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | tomcat | 9.0.122-150200.123.2 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | libtcnative-1-0 | 1.3.9-150200.6.11.2 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | tomcat | 9.0.122-150200.123.2 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | libtcnative-1-0 | 1.3.9-150200.6.11.2 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | tomcat | 9.0.122-150200.123.2 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | tomcat10 | 10.1.60-150200.5.82.2 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | libtcnative-1-0 | 1.3.9-150200.6.11.2 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | tomcat | 9.0.122-150200.123.2 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | tomcat10 | 10.1.60-150200.5.82.2 |
| SUSE Linux Enterprise Module for Basesystem 15 SP7 | libtcnative-1-0 | 1.3.9-150600.16.9.2 |
| SUSE Linux Enterprise Module for Web and Scripting 15 SP7 | libtcnative-1-0 | 1.3.9-150600.16.9.2 |
| SUSE Linux Enterprise Module for Web and Scripting 15 SP7 | tomcat | 9.0.122-150200.123.2 |
| SUSE Linux Enterprise Module for Web and Scripting 15 SP7 | tomcat10 | 10.1.60-150200.5.82.2 |
| SUSE Linux Enterprise Module for Web and Scripting 15 SP7 | tomcat11 | 11.0.26-150600.13.36.2 |
| SUSE Linux Enterprise Server 15 SP4-LTSS | libtcnative-1-0 | 1.3.9-150200.6.11.2 |
| SUSE Linux Enterprise Server 15 SP4-LTSS | tomcat | 9.0.122-150200.123.2 |
| SUSE Linux Enterprise Server 15 SP5-LTSS | libtcnative-1-0 | 1.3.9-150200.6.11.2 |
| SUSE Linux Enterprise Server 15 SP5-LTSS | tomcat | 9.0.122-150200.123.2 |
| SUSE Linux Enterprise Server 15 SP5-LTSS | tomcat10 | 10.1.60-150200.5.82.2 |
| SUSE Linux Enterprise Server 15 SP6-LTSS | libtcnative-1-0 | 1.3.9-150600.16.9.2 |
| SUSE Linux Enterprise Server 15 SP6-LTSS | tomcat | 9.0.122-150200.123.2 |
| SUSE Linux Enterprise Server 15 SP6-LTSS | tomcat10 | 10.1.60-150200.5.82.2 |
| SUSE Linux Enterprise Server 15 SP6-LTSS | tomcat11 | 11.0.26-150600.13.36.2 |
| SUSE Linux Enterprise Server 16.0 | libtcnative-1-0 | 1.3.9-160000.1.1 |
| SUSE Linux Enterprise Server 16.0 | libtcnative-2-0 | 2.0.16-160000.1.1 |
| SUSE Linux Enterprise Server 16.0 | tomcat | 9.0.122-160000.1.1 |
| SUSE Linux Enterprise Server 16.0 | tomcat10 | 10.1.60-160000.1.1 |
| SUSE Linux Enterprise Server 16.0 | tomcat11 | 11.0.26-160000.1.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | libtcnative-1-0 | 1.3.9-150200.6.11.2 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | tomcat | 9.0.122-150200.123.2 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | libtcnative-1-0 | 1.3.9-150200.6.11.2 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | tomcat | 9.0.122-150200.123.2 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | tomcat10 | 10.1.60-150200.5.82.2 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | libtcnative-1-0 | 1.3.9-150600.16.9.2 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | tomcat | 9.0.122-150200.123.2 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | tomcat10 | 10.1.60-150200.5.82.2 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | tomcat11 | 11.0.26-150600.13.36.2 |
| SUSE Linux Enterprise Server for SAP applications 16.0 | libtcnative-1-0 | 1.3.9-160000.1.1 |
| SUSE Linux Enterprise Server for SAP applications 16.0 | libtcnative-2-0 | 2.0.16-160000.1.1 |
| SUSE Linux Enterprise Server for SAP applications 16.0 | tomcat | 9.0.122-160000.1.1 |
| SUSE Linux Enterprise Server for SAP applications 16.0 | tomcat10 | 10.1.60-160000.1.1 |
| SUSE Linux Enterprise Server for SAP applications 16.0 | tomcat11 | 11.0.26-160000.1.1 |
| Ubuntu 24.04 LTS | tomcat10 | no fix |
| Ubuntu 24.04 LTS | tomcat9 | no fix |
| Ubuntu 26.04 LTS | tomcat10 | no fix |
| Ubuntu 26.04 LTS | tomcat11 | no fix |
| Ubuntu 26.04 LTS | tomcat9 | no fix |
| Ubuntu 26.10 | tomcat10 | no fix |
| Ubuntu 26.10 | tomcat11 | no fix |
| Ubuntu 26.10 | tomcat9 | no fix |
| Ubuntu Pro 14.04 LTS | tomcat6 | no fix |
| Ubuntu Pro 14.04 LTS | tomcat7 | no fix |
| Ubuntu Pro 16.04 LTS | tomcat7 | no fix |
| Ubuntu Pro 16.04 LTS | tomcat8 | no fix |
| Ubuntu Pro 18.04 LTS | tomcat8 | no fix |
| Ubuntu Pro 18.04 LTS | tomcat9 | no fix |
| Ubuntu Pro 20.04 LTS | tomcat9 | no fix |
| Ubuntu Pro 22.04 LTS | tomcat9 | no fix |
| openSUSE Leap 16.0 | libtcnative-1-0 | 1.3.9-160000.1.1 |
| openSUSE Leap 16.0 | libtcnative-2-0 | 2.0.16-160000.1.1 |
| openSUSE Leap 16.0 | tomcat | 9.0.122-160000.1.1 |
| openSUSE Leap 16.0 | tomcat10 | 10.1.60-160000.1.1 |
| openSUSE Leap 16.0 | tomcat11 | 11.0.26-160000.1.1 |
| openSUSE Tumbleweed | tomcat | 9.0.122-1.1 |
| openSUSE Tumbleweed | tomcat10 | 10.1.60-1.1 |
| openSUSE Tumbleweed | tomcat11 | 11.0.26-1.1 |