# CVE-2026-43513

## Summary

- **CVE ID:** CVE-2026-43513
- **Severity:** HIGH
- **CVSS Score:** 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N)
- **CWE:** CWE-178
- **Published:** May 12, 2026
- **Last Modified:** May 14, 2026

## 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.

## Affected Products

- Apache Software Foundation — Apache Tomcat (11.0.0-M1)
- Apache Software Foundation — Apache Tomcat (10.1.0-M1)
- Apache Software Foundation — Apache Tomcat (9.0.0.M1)
- Apache Software Foundation — Apache Tomcat (8.5.0)
- Apache Software Foundation — Apache Tomcat (7.0.0)
- Apache Software Foundation — Apache Tomcat (0)

## References

- [CNA](https://lists.apache.org/thread/ytjcgldshj73lcnd1sh95od5hrghwogp)
- [CVE](http://www.openwall.com/lists/oss-security/2026/05/12/9)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.47%
- **EPSS Percentile:** 39.0

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._