CVE-2026-50229— Apache Tomcat: XSS in number guess example
Quick assessment
Affected
Apache Software Foundation Apache Tomcat
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Apache Software Foundation Apache Tomcat是Apache Software Foundation基金会的应用服务器。 Apache Tomcat存在跨站脚本漏洞，该漏洞源于在Web页面中脚本相关HTML标签中和不当（基本跨站脚本），可能导致攻击者进行跨站脚本攻击。
Public Exploits 1
Nuclei · 1
CVE-2026-50229.yaml [template]
Possible ATT&CK Techniques 3 AI
T1059 · Command and Scripting Interpreter T1071 · Application Layer Protocol T1189 · Drive-by CompromiseAffected Version Matrix 6
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Apache Software Foundation | Apache Tomcat | 11.0.0-M1≤ 11.0.22 |
affected |
10.1.0-M1≤ 10.1.55 |
affected | ||
9.0.0.M1≤ 9.0.118 |
affected | ||
8.5.0≤ 8.5.100 |
affected | ||
7.0.0≤ 7.0.109 |
affected | ||
< 7.0.0 |
unknown |
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I. Basic Information for CVE-2026-50229
Vulnerability Information
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Vulnerability Title
Apache Tomcat: XSS in number guess example
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
Web页面中脚本相关HTML标签转义处理不恰当(基本跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
Apache Software Foundation Apache Tomcat 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache Software Foundation Apache Tomcat是Apache Software Foundation基金会的应用服务器。 Apache Tomcat存在跨站脚本漏洞，该漏洞源于在Web页面中脚本相关HTML标签中和不当（基本跨站脚本），可能导致攻击者进行跨站脚本攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Apache Software Foundation | Apache Tomcat | 11.0.0-M1 ~ 11.0.22 | - |
|
II. Public POCs for CVE-2026-50229
| # | POC Description | Source Link | Shenlong Link |
|---|---|---|---|
| 1 | 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. | https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-50229.yaml | POC Details |
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Mailing List Discussions for CVE-2026-50229 (1)
Same Patch Batch · Apache Software Foundation · 2026-06-29 · 7 CVEs total
| CVE-2026-55957 | Apache Tomcat: Authentication bypass with JNDIRealm and GSSAPI authenticated bind | |
| CVE-2026-55956 | Apache Tomcat: Security constraints for default servlet ignored method | |
| CVE-2026-55955 | Apache Tomcat: EncryptInterceptor not protected against replay attacks | |
| CVE-2026-55276 | Apache Tomcat: Logged effective web.xml is incomplete | |
| CVE-2026-53434 | Apache Tomcat: Invalid CRL configuration doesn't trigger failure for FFM Connector | |
| CVE-2026-53404 | Apache Tomcat: Bad ornext processing in RewriteValve |
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V. Comments for CVE-2026-50229
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