Authentication Bypass by Alternate Name Affecting org.apache.tomcat.embed:tomcat-embed-websocket 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.
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 applications- Snyk IDSNYK-JAVA-ORGAPACHETOMCATEMBED-20552494
- published7 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.embed:tomcat-embed-websocket to version 9.0.122, 10.1.60, 11.0.26 or higher.
Overview
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.