CVE-2026-50229: Apache Tomcat: XSS in number guess example

Published Jun 29, 2026
·
Updated

Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) vulnerability in the number guess example for Apache Tomcat.

Affected Software

13 affected componentsFixes available
Apache Tomcat>=11.0.0-M1<=11.0.22
Apache Tomcat>=10.1.0-M1<=10.1.55
Apache Tomcat>=9.0.0.M1<=9.0.118
Apache Tomcat>=8.5.0<=8.5.100
Apache Tomcat>=7.0.0<=7.0.109
Apache Tomcat<=7.0.109
Apache Tomcat>=8.5.0<=8.5.100
Apache Tomcat>=9.0.0<9.0.119
Apache Tomcat>=10.1.0<10.1.56
Apache Tomcat>=11.0.0<11.0.23
debian/tomcat10<=10.1.55-1~deb12u1, <=10.1.55-1~deb13u1, <=10.1.55-1
debian/tomcat11<=11.0.22-1~deb13u1, <=11.0.22-2
debian/tomcat9<=9.0.43-2~deb11u10
9.0.118-0+deb11u19.0.70-29.0.95-19.0.118-1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade debian/tomcat9 to a version that resolves this vulnerability.

    Fixed in 9.0.118-0+deb11u1Fixed in 9.0.70-2Fixed in 9.0.95-1Fixed in 9.0.118-1
  2. Upgrade

    Upgrade Apache Tomcat to a version that resolves this vulnerability.

    Fixed in 11.0.23
  3. Upgrade

    Upgrade Apache Tomcat to a version that resolves this vulnerability.

    Fixed in 10.1.56
  4. Upgrade

    Upgrade Apache Tomcat to a version that resolves this vulnerability.

    Fixed in 9.0.119

Event History

Jun 29, 2026
CVE Published
via MITRE·08:36 PM
Data Sourced
via MITRE·08:36 PM
DescriptionWeakness
Data Sourced
via NVD·09:16 PM
DescriptionSeverityWeaknessAffected Software
Jul 15, 2026
Data Sourced
via Launchpad·04:40 PM
Description
Data Sourced
via Debian·04:41 PM
DescriptionAffected Software
Jul 16, 2026
Data Sourced
via Ubuntu·04:41 PM
RemedyDescriptionSeverityAffected Software
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Frequently Asked Questions

1

What is the severity of CVE-2026-50229?

CVE-2026-50229 has a risk rating of 30, indicating a significant security concern.

2

How do I fix CVE-2026-50229?

To fix CVE-2026-50229, upgrade Apache Tomcat to a version beyond 11.0.22, 10.1.55, 9.0.118, or 8.5.100.

3

What types of applications are affected by CVE-2026-50229?

CVE-2026-50229 affects applications utilizing the number guess example within various versions of Apache Tomcat.

4

What specific vulnerability does CVE-2026-50229 describe?

CVE-2026-50229 describes an improper neutralization of script-related HTML tags, leading to a cross-site scripting (XSS) vulnerability.

5

Is CVE-2026-50229 present in all Apache Tomcat versions?

No, CVE-2026-50229 is present in specific versions of Apache Tomcat ranging from 8.5.0 to 11.0.22.

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