CVE-2026-43513

Published: May 12, 2026Modified: Jun 17, 2026

7.5

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Exploitability: 3.9 / Impact: 3.6

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

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 (5)

Products: Apache: Tomcat

Apache

1 product

Tomcat

Configuration A

5 vulnerable

Vulnerable Software	Affected Versions
Apache Tomcat	From 10.1.0 to 10.1.55
Apache Tomcat	From 11.0.0 to 11.0.22
Apache Tomcat	From 7.0.0 to 7.0.109
Apache Tomcat	From 8.5.0 to 8.5.100
Apache Tomcat	From 9.0.0 to 9.0.118

Related CWEs

CWE-178

Improper Handling of Case Sensitivity

The product does not properly account for differences in case sensitivity when accessing or determining the properties of a resource, leading to inconsistent results.

References (2)

https://lists.apache.org/thread/ytjcgldshj73lcnd1sh95od5hrghwogp

Source: security@apache.org

Mailing ListVendor Advisory

http://www.openwall.com/lists/oss-security/2026/05/12/9

Source: af854a3a-2127-422b-91ae-364da2661108

Mailing ListThird Party Advisory

Timeline

No history available yet.