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CVE-2026-50229

MediumPublished

Apache Tomcat: XSS in number guess example

Published: Jun 29, 2026
Updated: Jun 30, 2026
Assigning CNA: apache
Evidence observed: Aug 17, 2026

Primary CVSS

6.1/ 10Medium

nvd · CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS probability estimate

4.1%

Low · next 30 days

Percentile: 90.3%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

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.

Sources

CVE-2026-50229Exploit
Automated XSS scanner and proof-of-concept exploit for CVE-2026-50229 in Apache Tomcat examples. Detects and exploits reflected cross-site scripting via unescaped JSP parameters.

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