Improper Authorization Affecting org.apache.tomcat:tomcat package, versions [9.0.0.M1,9.0.119)[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.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applicationsSnyk Learn
Learn about Improper Authorization vulnerabilities in an interactive lesson.
Start learning- Snyk IDSNYK-JAVA-ORGAPACHETOMCAT-17733896
- published30 Jun 2026
- disclosed29 Jun 2026
- creditUnknown
Introduced: 29 Jun 2026
CVE-2026-55956 (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 Authorization due to the improper enforcement of security constraints in the default servlet when certain HTTP methods or method omissions are configured. An attacker can gain unauthorized access to protected resources by sending requests using HTTP methods that are not properly restricted.