Improper Authentication Affecting org.apache.tomcat:tomcat package, versions [9.0.13,9.0.119)[10.1.0-M1,10.1.56)[11.0.0-M1,11.0.23)
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-ORGAPACHETOMCAT-17732889
- published30 Jun 2026
- disclosed29 Jun 2026
- creditUnknown
Introduced: 29 Jun 2026
CVE-2026-55955 (opens in a new tab)How to fix?
Upgrade org.apache.tomcat:tomcat to version 9.0.119, 10.1.56, 11.0.23 or higher.
Overview
org.apache.tomcat:tomcat is an implementation of the Java Servlet, JavaServer Pages, Java Expression Language and Java WebSocket technologies.
Affected versions of this package are vulnerable to Improper Authentication in the EncryptionInterceptor process of the cluster component. An attacker can gain unauthorized access or perform unauthorized actions by replaying previously captured authentication data.