Vulnerability · Published Jun 29, 2026 · Assigned by apache
CVE-2026-50229Apache Tomcat: XSS in number guess example
Medium 6.1
In plain English
A medium-severity security flaw in Apache Tomcat from Apache Software Foundation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 4.1% (higher than 91% of all known vulnerabilities). Ready-made attack tooling exists: Nuclei, public proof-of-concept code. Fixed versions are available - upgrade the affected package.
Official description
Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) vulnerability in the number guess example for Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.22, from 10.1.0-M1 through 10.1.55, from 9.0.0.M1 through 9.0.118, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Other versions that have reached end of support may also be affected. Users are recommended to upgrade to version 11.0.23, 10.1.56 or 9.0.119, which fix the issue.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | tomcat | 1:9.0.120-1.el8_10 | ALSA-2026:68677 |
| AlmaLinux:9 | tomcat | 1:9.0.120-2.el9_8 | ALSA-2026:68660 |
| AlmaLinux:8 | tomcat-admin-webapps | 1:9.0.120-1.el8_10 | ALSA-2026:68677 |
| AlmaLinux:9 | tomcat-admin-webapps | 1:9.0.120-2.el9_8 | ALSA-2026:68660 |
| AlmaLinux:8 | tomcat-docs-webapp | 1:9.0.120-1.el8_10 | ALSA-2026:68677 |
| AlmaLinux:9 | tomcat-docs-webapp | 1:9.0.120-2.el9_8 | ALSA-2026:68660 |
| AlmaLinux:8 | tomcat-el-3.0-api | 1:9.0.120-1.el8_10 | ALSA-2026:68677 |
| AlmaLinux:9 | tomcat-el-3.0-api | 1:9.0.120-2.el9_8 | ALSA-2026:68660 |
| AlmaLinux:8 | tomcat-jsp-2.3-api | 1:9.0.120-1.el8_10 | ALSA-2026:68677 |
| AlmaLinux:9 | tomcat-jsp-2.3-api | 1:9.0.120-2.el9_8 | ALSA-2026:68660 |
| AlmaLinux:8 | tomcat-lib | 1:9.0.120-1.el8_10 | ALSA-2026:68677 |
| AlmaLinux:9 | tomcat-lib | 1:9.0.120-2.el9_8 | ALSA-2026:68660 |
| AlmaLinux:8 | tomcat-servlet-4.0-api | 1:9.0.120-1.el8_10 | ALSA-2026:68677 |
| AlmaLinux:9 | tomcat-servlet-4.0-api | 1:9.0.120-2.el9_8 | ALSA-2026:68660 |
| AlmaLinux:8 | tomcat-webapps | 1:9.0.120-1.el8_10 | ALSA-2026:68677 |
| AlmaLinux:9 | tomcat-webapps | 1:9.0.120-2.el9_8 | ALSA-2026:68660 |
| AlmaLinux:10 | tomcat9 | 1:9.0.120-1.el10_2.alma.1 | ALSA-2026:68651 |
| AlmaLinux:10 | tomcat9-admin-webapps | 1:9.0.120-1.el10_2.alma.1 | ALSA-2026:68651 |
| AlmaLinux:10 | tomcat9-docs-webapp | 1:9.0.120-1.el10_2.alma.1 | ALSA-2026:68651 |
| AlmaLinux:10 | tomcat9-el-3.0-api | 1:9.0.120-1.el10_2.alma.1 | ALSA-2026:68651 |
| AlmaLinux:10 | tomcat9-jsp-2.3-api | 1:9.0.120-1.el10_2.alma.1 | ALSA-2026:68651 |
| AlmaLinux:10 | tomcat9-lib | 1:9.0.120-1.el10_2.alma.1 | ALSA-2026:68651 |
| AlmaLinux:10 | tomcat9-servlet-4.0-api | 1:9.0.120-1.el10_2.alma.1 | ALSA-2026:68651 |
| AlmaLinux:10 | tomcat9-webapps | 1:9.0.120-1.el10_2.alma.1 | ALSA-2026:68651 |
| Debian:12 | tomcat10 | no fix listed | DEBIAN-CVE-2026-50229 |
| Debian:13 | tomcat10 | no fix listed | DEBIAN-CVE-2026-50229 |
| Debian:14 | tomcat10 | 10.1.60-1 | DEBIAN-CVE-2026-50229 |
| Debian:13 | tomcat11 | no fix listed | DEBIAN-CVE-2026-50229 |
| Debian:14 | tomcat11 | 11.0.24-1 | DEBIAN-CVE-2026-50229 |
| Debian:12 | tomcat9 | 9.0.70-2 | DEBIAN-CVE-2026-50229 |
| Debian:13 | tomcat9 | 9.0.70-2 | DEBIAN-CVE-2026-50229 |
| Debian:14 | tomcat9 | 9.0.70-2 | DEBIAN-CVE-2026-50229 |
| Maven | org.apache.tomcat:tomcat | 11.0.23 | GHSA-pg42-rg8c-j886 |
| Maven | org.apache.tomcat:tomcat | 10.1.56 | GHSA-pg42-rg8c-j886 |
| Maven | org.apache.tomcat:tomcat | no fix listed | GHSA-pg42-rg8c-j886 |
| Maven | org.apache.tomcat:tomcat | no fix listed | GHSA-pg42-rg8c-j886 |
| Maven | org.apache.tomcat:tomcat | 9.0.119 | GHSA-pg42-rg8c-j886 |
| Ubuntu:24.04:LTS | tomcat10 | no fix listed | UBUNTU-CVE-2026-50229 |
| Ubuntu:25.10 | tomcat10 | no fix listed | UBUNTU-CVE-2026-50229 |
| Ubuntu:26.04:LTS | tomcat10 | no fix listed | UBUNTU-CVE-2026-50229 |
| Ubuntu:26.10 | tomcat10 | no fix listed | UBUNTU-CVE-2026-50229 |
| Ubuntu:25.10 | tomcat11 | no fix listed | UBUNTU-CVE-2026-50229 |
| Ubuntu:26.04:LTS | tomcat11 | no fix listed | UBUNTU-CVE-2026-50229 |
| Ubuntu:26.10 | tomcat11 | no fix listed | UBUNTU-CVE-2026-50229 |
| Ubuntu:24.04:LTS | tomcat9 | no fix listed | UBUNTU-CVE-2026-50229 |
| Ubuntu:25.10 | tomcat9 | no fix listed | UBUNTU-CVE-2026-50229 |
| Ubuntu:26.04:LTS | tomcat9 | no fix listed | UBUNTU-CVE-2026-50229 |
| Ubuntu:26.10 | tomcat9 | no fix listed | UBUNTU-CVE-2026-50229 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Apache Software Foundation | Apache Tomcat | 11.0.0-M1 – through 11.0.2210.1.0-M1 – through 10.1.559.0.0.M1 – through 9.0.1188.5.0 – through 8.5.1007.0.0 – through 7.0.109 |
Weakness: CWE-80 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N