apache/tomcat · Security
Apache Tomcat: LockOutRealm treats user names as case-sensitive
- GHSA ID
- GHSA-5mp6-jrq3-r938
- CVE ID
- CVE-2026-43513
- Severity
- high
- Published
- Updated
- CVSS
- 7.5 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- CVSS v3
- 7.5 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
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.
CWEs
- CWE-178 · Improper Handling of Case Sensitivity
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-43513 ↗
- https://lists.apache.org/thread/ytjcgldshj73lcnd1sh95od5hrghwogp ↗
- http://www.openwall.com/lists/oss-security/2026/05/12/9 ↗
- https://github.com/apache/tomcat/commit/4a90d3fa93988c447cd5bb7482f76ff70d7f15c2 ↗
- https://github.com/apache/tomcat/commit/6dd75beb55bd42fc5f78e929596b25018cd17717 ↗
- https://github.com/apache/tomcat/commit/83f3e51df7b87f5f6e626951c575ded1a512e8ef ↗
- https://tomcat.apache.org/security-10.html ↗
- https://tomcat.apache.org/security-11.html ↗
- https://tomcat.apache.org/security-9.html ↗
- https://github.com/advisories/GHSA-5mp6-jrq3-r938 ↗