Improper Handling of Case Sensitivity Affecting org.apache.tomcat.embed:tomcat-embed-core package, versions [,9.0.118)[10.0.0-M1,10.1.55)[11.0.0-M1,11.0.22)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JAVA-ORGAPACHETOMCATEMBED-16691224
- published14 May 2026
- disclosed12 May 2026
- creditUnknown
Introduced: 12 May 2026
CVE-2026-43513 (opens in a new tab)How to fix?
Upgrade org.apache.tomcat.embed:tomcat-embed-core to version 9.0.118, 10.1.55, 11.0.22 or higher.
Overview
org.apache.tomcat.embed:tomcat-embed-core is a Core Tomcat implementation.
Affected versions of this package are vulnerable to Improper Handling of Case Sensitivity in the LockOutRealm function. An attacker can bypass account lockout protections by submitting usernames with different letter casing.