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Insufficient Session Expiration vulnerability in Apache Tomcat meant that if the session ID for an authenticated HTTP session was changed after a WebSocket connection had been established under that authenticated HTTP session, the WebSokcet session would not be closed as required by the Jakarta WebSocket specification when the HTTP session ended.
This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.0.M1 through 9.0.120.
The following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.0 through 8.5.100, from 7.0.43 through 7.0.109. Other unsupported versions may also be affected.
Users are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121, which fix the issue.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Apache Tomcat | — | Upgrade Apache Tomcat to 11.0.25Upgrade Apache Tomcat to 10.1.59Upgrade Apache Tomcat to the latest available versionUpgrade Apache Tomcat to 9.0.121 | Aug 26, 2026 | Aug 25, 2026 |
| Debian | — | Upgrade tomcat9 | Aug 27, 2026 | Aug 27, 2026 |
| Redhat_linux | — | Upgrade jws7-tomcat-libUpgrade jws6-tomcat-el-5.0-apiUpgrade jws6-tomcat-selinuxUpgrade jws7-tomcat-jsp-3.1-apiUpgrade jws7-tomcat-el-5.0-apiUpgrade jws7-tomcatUpgrade jws6-tomcat-jsp-3.1-apiUpgrade jws6-tomcatUpgrade jws6-tomcat-libUpgrade jws7-tomcat-webappsUpgrade jws6-tomcat-admin-webappsUpgrade jws7-tomcat-selinuxUpgrade jws6-tomcat-servlet-6.0-apiUpgrade jws7-tomcat-javadocUpgrade jws6-tomcat-webappsUpgrade jws6-tomcat-docs-webappUpgrade jws7-tomcat-admin-webappsUpgrade jws7-tomcat-docs-webappUpgrade jws6-tomcat-javadocUpgrade jws7-tomcat-servlet-6.0-apiNo solution exists | Sep 30, 2026 | Aug 25, 2026 |
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