CVE-2026-43513
Last modified
CVE-2026-43513 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 0.47% chance of exploitation in the next 30 days.
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
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Apache | Tomcat | >= 7.0.0, <= 7.0.109 |
| Apache | Tomcat | >= 8.5.0, <= 8.5.100 |
| Apache | Tomcat | >= 9.0.0, < 9.0.118 |
| Apache | Tomcat | >= 10.1.0, < 10.1.55 |
| Apache | Tomcat | >= 11.0.0, < 11.0.22 |
References
- https://lists.apache.org/thread/ytjcgldshj73lcnd1sh95od5hrghwogpMailing List, Vendor Advisory
- http://www.openwall.com/lists/oss-security/2026/05/12/9Mailing List, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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