Vulnerability 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 Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Apache | Tomcat | >= 7.0.0, <= 7.0.109 |
Related Weaknesses (CWE)
References
- https://lists.apache.org/thread/ytjcgldshj73lcnd1sh95od5hrghwogpMailing ListVendor Advisory
- http://www.openwall.com/lists/oss-security/2026/05/12/9Mailing ListThird Party Advisory
FAQ
What is CVE-2026-43513?
CVE-2026-43513 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 t...
How severe is CVE-2026-43513?
CVE-2026-43513 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-43513?
Check the references section above for vendor advisories and patch information. Affected products include: Apache Tomcat.