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URL: https://nvd.nist.gov/vuln/detail/CVE-2026-43513

⇱ NVD - CVE-2026-43513

  1. Vulnerabilities

CVE-2026-43513 Detail

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
http://www.openwall.com/lists/oss-security/2026/05/12/9 CVE Mailing List  Third Party Advisory 
https://lists.apache.org/thread/ytjcgldshj73lcnd1sh95od5hrghwogp Apache Software Foundation Mailing List  Vendor Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-178 Improper Handling of Case Sensitivity Apache Software Foundation  

Known Affected Software Configurations Switch to CPE 2.2

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Denotes Vulnerable Software
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Change History

6 change records found show changes

CVE Modified by CISA-ADP 6/17/2026 6:49:50 AM

Action Type Old Value New Value
Added SSVC 
{"timestamp":"2026-05-14T16:34:43.121351Z","id":"CVE-2026-43513","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}

CVE Modified by Apache Software Foundation 6/17/2026 6:49:50 AM

Action Type Old Value New Value
Added Affected 
[{"vendor":"Apache Software Foundation","product":"Apache Tomcat","defaultStatus":"unaffected","versions":[{"version":"11.0.0-M1","lessThanOrEqual":"11.0.21","versionType":"semver","status":"affected"},{"version":"10.1.0-M1","lessThanOrEqual":"10.1.54","versionType":"semver","status":"affected"},{"version":"9.0.0.M1","lessThanOrEqual":"9.0.117","versionType":"semver","status":"affected"},{"version":"8.5.0","lessThanOrEqual":"8.5.100","versionType":"semver","status":"affected"},{"version":"7.0.0","lessThanOrEqual":"7.0.109","versionType":"semver","status":"affected"},{"version":"0","lessThan":"7.00","versionType":"semver","status":"unknown"}]}]

Initial Analysis by NIST 5/15/2026 11:53:14 AM

Action Type Old Value New Value
Added CPE Configuration 
OR
 *cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:* versions from (including) 8.5.0 up to (including) 8.5.100
 *cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:* versions from (including) 10.1.0 up to (excluding) 10.1.55
 *cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:* versions from (including) 9.0.0 up to (excluding) 9.0.118
 *cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:* versions from (including) 11.0.0 up to (excluding) 11.0.22
 *cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:* versions from (including) 7.0.0 up to (including) 7.0.109
Added Reference Type 
Apache Software Foundation: https://lists.apache.org/thread/ytjcgldshj73lcnd1sh95od5hrghwogp Types: Mailing List, Vendor Advisory
Added Reference Type 
CVE: http://www.openwall.com/lists/oss-security/2026/05/12/9 Types: Mailing List, Third Party Advisory

CVE Modified by CISA-ADP 5/14/2026 4:17:05 PM

Action Type Old Value New Value
Added CVSS V3.1 
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVE Modified by CVE 5/12/2026 2:17:26 PM

Action Type Old Value New Value
Added Reference 
http://www.openwall.com/lists/oss-security/2026/05/12/9

New CVE Received from Apache Software Foundation 5/12/2026 12:16:18 PM

Action Type Old Value New Value
Added 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.
Added CWE 
CWE-178
Added Reference 
https://lists.apache.org/thread/ytjcgldshj73lcnd1sh95od5hrghwogp

Quick Info

CVE Dictionary Entry:
CVE-2026-43513
NVD Published Date:
05/12/2026
NVD Last Modified:
06/17/2026
Source:
Apache Software Foundation