CVE-2026-43513
Apache Tomcat: LockOutRealm treats user names as case-sensitive
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-178 |
| Vendor | apache software foundation |
| Product | apache tomcat |
| Published | May 12, 2026 |
| Last Updated | May 12, 2026 |
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Affected Versions
Apache Software Foundation / Apache Tomcat
11.0.0-M1 ≤ 11.0.21 10.1.0-M1 ≤ 10.1.54 9.0.0.M1 ≤ 9.0.117 8.5.0 ≤ 8.5.100 7.0.0 ≤ 7.0.109