CVE-2026-43513

CVE-2026-43513: Apache Tomcat: LockOutRealm treats user names as case-sensitive

Vendor Apache Software Foundation
Product Apache Tomcat
Weakness CWE-178
Published May 12, 2026
Last update May 14, 2026

CVSS base score

What the vulnerability does

Description

Improper Handling of Case Sensitivity vulnerability in LockOutRealm in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10.1.54, from 9.0.0.M1 through 9.0.117, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Older unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.22, 10.1.55 or 9.0.118 which fix the issue.

Key dates

Disclosure timeline

May 12, 2026 CVE published
May 14, 2026 Record updated