CVE-2026-50229

Apache Tomcat: XSS in number guess example

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.

Scores

Weaknesses (CWE)

• CWE-80

European references

• ENISA EUVD · EUVD-2026-40226
• GCVE · GCVE-0-2026-50229

CERT-FR advisories

• CERTFR-2026-AVI-0817 — Multiples vulnérabilités dans Apache Tomcat · cert.ssi.gouv.fr

Affected configurations (NVD CPE)

• cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:* ≤ 7.0.109
• cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:* ≥ 8.5.0 ≤ 8.5.100
• cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:* ≥ 9.0.0 < 9.0.119
• cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:* ≥ 10.1.0 < 10.1.56
• cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:* ≥ 11.0.0 < 11.0.23

Affected products

References

• https://lists.apache.org/thread/wlt2no8bw45zl1w8byop4zfqphldf5j0
• http://www.openwall.com/lists/oss-security/2026/06/29/20

Sources