Insufficient Session Expiration in Apache Tomcat - CVE-2026-73180

Vulnerability identifier: #VU145388

CSH Severity: Low

CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-73180

CWE-ID: CWE-613

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote user to maintain an authenticated websocket session after the associated http session has ended.

The vulnerability exists due to improper session management in the websocket session handling when the session id of an authenticated http session is changed after a websocket connection has been established. A remote user can continue using the websocket connection to maintain an authenticated websocket session after the associated http session has ended.

The issue occurs only if the session id for the authenticated http session is changed after the websocket connection has already been established.

Apache Tomcat
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise Server 15 SP6
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise High Performance Computing 12
Web and Scripting Module
ApplinX
tomcat-jsp-2_3-api
tomcat-el-3_0-api
tomcat-javadoc
tomcat-webapps
tomcat-docs-webapp
tomcat-admin-webapps
tomcat
tomcat-lib
tomcat-servlet-4_0-api

Install security update from vendor's website.

Apache Tomcat - addressed in versions 9.0.121, 10.1.59, 11.0.25
tomcat-jsp-2_3-api - addressed in versions 9.0.121-3.177.3, 9.0.121-150200.120.1
tomcat-el-3_0-api - addressed in versions 9.0.121-3.177.3, 9.0.121-150200.120.1
tomcat-javadoc - update to 9.0.121-3.177.3
tomcat-webapps - addressed in versions 9.0.121-3.177.3, 9.0.121-150200.120.1
tomcat-docs-webapp - update to 9.0.121-3.177.3
tomcat-admin-webapps - addressed in versions 9.0.121-3.177.3, 9.0.121-150200.120.1
tomcat - addressed in versions 9.0.121-3.177.3, 9.0.121-150200.120.1
tomcat-lib - addressed in versions 9.0.121-3.177.3, 9.0.121-150200.120.1
tomcat-servlet-4_0-api - addressed in versions 9.0.121-3.177.3, 9.0.121-150200.120.1

• https://lists.apache.org/api/email.lua?id=g0dvvbt0ksxhcork9r9nl41w2jl21wfh
• https://tomcat.apache.org/security-11.html

• Multiple vulnerabilities in Apache Tomcat
• SUSE update for tomcat
• SUSE update for tomcat
• Multiple vulnerabilities in IBM ApplinX