Apache Tomcat Insufficient Session Expiration CVE-2026-73180 (v11.0.25+,10.1.58+,9.0.121+)
CVE-2026-73180 Published on August 25, 2026
Apache Tomcat: Authenticated WebSocket session survives end of HTTP session
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.
Weakness Type
Insufficient Session Expiration
According to WASC, "Insufficient Session Expiration is when a web site permits an attacker to reuse old session credentials or session IDs for authorization."
Products Associated with CVE-2026-73180
Want to know whenever a new CVE is published for Apache Tomcat? stack.watch will email you.
Affected Versions
Apache Software Foundation Apache Tomcat:- Version 11.0.0-M1, <= 11.0.24 is affected.
- Version 10.1.0-M1, <= 10.1.57 is affected.
- Version 9.0.0.M1, <= 9.0.120 is affected.
- Version 8.5.0, <= 8.5.100 is affected.
- Version 7.0.43, <= 7.0.109 is affected.
- Before 7.0.43 is unaffected.