CVE-2026-43513

HIGH EPSS 37.0%
Published May 12, 20261mo ago · Modified Jun 17, 20262w ago
7.5 CVSS 3.1
High
Find Similar
Published May 12, 2026 1mo ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity None
Availability None

Threat Intelligence

EPSS Exploit Probability
37.0% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-178

Affected Products 5

VendorProductVersionRange
apachetomcat*≥7.0.0  –  ≤7.0.109
apachetomcat*≥8.5.0  –  ≤8.5.100
apachetomcat*≥9.0.0  –  <9.0.118
apachetomcat*≥10.1.0  –  <10.1.55
apachetomcat*≥11.0.0  –  <11.0.22

References 2

  • openwall.com http://www.openwall.com/lists/oss-security/2026/05/12/9
    Mailing ListThird Party Advisory
  • lists.apache.org https://lists.apache.org/thread/ytjcgldshj73lcnd1sh95od5hrghwogp
    Mailing ListVendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.