CVE-2026-73180
Published:August 25, 2026
Updated:August 29, 2026
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.
Affected Packages
https://github.com/apache/tomcat.git (GITHUB):
Affected version(s) >=9.0.0-M1 <9.0.121Fix Suggestion:
Update to version 9.0.121https://github.com/apache/tomcat.git (GITHUB):
Affected version(s) >=11.0.0-M1 <11.0.25Fix Suggestion:
Update to version 11.0.25https://github.com/apache/tomcat.git (GITHUB):
Affected version(s) >=10.1.0-M1 <10.1.58Fix Suggestion:
Update to version 10.1.58org.apache.tomcat.embed:tomcat-embed-websocket (JAVA):
Affected version(s) >=11.0.0-M1 <11.0.25Fix Suggestion:
Update to version 11.0.25org.apache.tomcat:tomcat-websocket (JAVA):
Affected version(s) >=9.0.0.M1 <9.0.121Fix Suggestion:
Update to version 9.0.121org.apache.tomcat.embed:tomcat-embed-websocket (JAVA):
Affected version(s) >=10.1.0-M1 <10.1.59Fix Suggestion:
Update to version 10.1.59org.apache.tomcat:tomcat-websocket (JAVA):
Affected version(s) >=10.1.0-M1 <10.1.59Fix Suggestion:
Update to version 10.1.59org.apache.tomcat:tomcat-websocket (JAVA):
Affected version(s) >=11.0.0-M1 <11.0.25Fix Suggestion:
Update to version 11.0.25org.apache.tomcat.embed:tomcat-embed-websocket (JAVA):
Affected version(s) >=9.0.0.M1 <9.0.121Fix Suggestion:
Update to version 9.0.121Related Resources (4)
Do you need more information?
Contact UsCVSS v4
Base Score:
7.6
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.8
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Weakness Type (CWE)
Insufficient Session Expiration
EPSS
Base Score:
0.54