Insufficient Session Expiration Affecting org.apache.tomcat:tomcat-websocket package, versions [9.0.0.M1, 9.0.121)[10.1.0-M1, 10.1.59)[11.0.0-M1, 11.0.25)
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-ORGAPACHETOMCAT-19342256
- published27 Aug 2026
- disclosed26 Aug 2026
- credit0xCc.zhang
Introduced: 26 Aug 2026
NewCVE-2026-73180 (opens in a new tab)How to fix?
Upgrade org.apache.tomcat:tomcat-websocket to version 9.0.121, 10.1.59, 11.0.25 or higher.
Overview
org.apache.tomcat:tomcat-websocket is a Tomcat WebSocket (JSR356) implementation.
Affected versions of this package are vulnerable to Insufficient Session Expiration due to the improper termination of WebSocket sessions when the associated HTTP session ends. An attacker can maintain access to resources beyond the intended session duration by establishing a WebSocket connection under an authenticated HTTP session and continuing to interact through the WebSocket after the HTTP session has expired.
Note: This issue was fixed in Apache Tomcat 10.1.58 but the release vote for the 10.1.58 release candidate did not pass. Therefore, although users must download 10.1.59 to obtain a version that includes a fix for this issue, version 10.1.58 is not included in the list of affected versions.