Authentication Bypass by Alternate Name Affecting org.apache.tomcat:tomcat package, versions [9.0.0.M1, 9.0.122)[10.1.0-M1, 10.1.60)[11.0.0-M1, 11.0.26)
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-20825536
- published11 Oct 2026
- disclosed23 Sept 2026
- creditMark Thomas
Introduced: 23 Sep 2026
NewCVE-2026-76183 (opens in a new tab)How to fix?
Upgrade org.apache.tomcat:tomcat to version 9.0.122, 10.1.60, 11.0.26 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 Authentication Bypass by Alternate Name via the WebSocket endpoint security constraint handling. An attacker can gain unauthorized access to protected resources by connecting to endpoints using alternate names.