CVE-2026-43513

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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://lists.apache.org/thread/ytjcgldshj73lcnd1sh95od5hrghwogp	Mailing List Vendor Advisory
http://www.openwall.com/lists/oss-security/2026/05/12/9	Mailing List Third Party Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:apache:tomcat::::::::
	cpe:2.3:a:apache:tomcat::::::::
	cpe:2.3:a:apache:tomcat::::::::
	cpe:2.3:a:apache:tomcat::::::::
	cpe:2.3:a:apache:tomcat::::::::

History

15 May 2026, 15:53

Type	Values Removed	Values Added
CPE		cpe:2.3:a:apache:tomcat::::::::
First Time		Apache tomcat Apache
References	~~() https://lists.apache.org/thread/ytjcgldshj73lcnd1sh95od5hrghwogp -~~	() https://lists.apache.org/thread/ytjcgldshj73lcnd1sh95od5hrghwogp - Mailing List, Vendor Advisory
References	~~() http://www.openwall.com/lists/oss-security/2026/05/12/9 -~~	() http://www.openwall.com/lists/oss-security/2026/05/12/9 - Mailing List, Third Party Advisory

14 May 2026, 20:17

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.5

12 May 2026, 18:17

Type	Values Removed	Values Added
References		() http://www.openwall.com/lists/oss-security/2026/05/12/9 -

12 May 2026, 16:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-05-12 16:16

Updated : 2026-05-15 15:53

NVD link : CVE-2026-43513

Mitre link : CVE-2026-43513

CVE.ORG link : CVE-2026-43513

JSON object : View

Products Affected

apache

tomcat

CWE

CWE-178

Improper Handling of Case Sensitivity

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