Medium severity · published Jun 29, 2026
CVE-2026-50229
Apache Tomcat: XSS in number guess example
6.1
CVSS
4.1%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)4.1% · higher than 91% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
TO
Tomcat · Apache
11.0.0-M1 through 11.0.22; 10.1.0-M1 through 10.1.55; 9.0.0.M1 through 9.0.118; 8.5.0 through 8.5.100; 7.0.0 through 7.0.109 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-50229
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-50229
Vendor Advisory
https://lists.apache.org/thread/wlt2no8bw45zl1w8byop4zfqphldf5j0
Third Party Advisory
http://www.openwall.com/lists/oss-security/2026/06/29/20
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