CVE-2026-73180: CWE-613 Insufficient Session Expiration in Apache Software Foundation Apache Tomcat
Description
CVE-2026-73180 is an Insufficient Session Expiration vulnerability in Apache Tomcat affecting multiple versions. The issue occurs when a session ID for an authenticated HTTP session changes after a WebSocket connection is established; the WebSocket session does not close as required when the HTTP session ends. This affects Apache Tomcat versions from 11.0.0-M1 through 11.0.24, 10.1.0-M1 through 10.1.57, and 9.0.0.M1 through 9.0.120, as well as some older EOL versions. Users are advised to upgrade to fixed versions 11.0.25, 10.1.58, or 9.0.121.
CVSS v3.1
Score 6.8medium
Affected software
Apache Software Foundation
Apache Tomcat
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability CVE-2026-73180 in Apache Tomcat involves insufficient session expiration related to WebSocket connections. Specifically, if the HTTP session ID changes after a WebSocket connection is established under that session, the WebSocket session remains open contrary to the Jakarta WebSocket specification, which mandates closure when the HTTP session ends. This flaw affects Apache Tomcat versions 11.0.0-M1 through 11.0.24, 10.1.0-M1 through 10.1.57, and 9.0.0.M1 through 9.0.120, as well as older EOL versions 8.5.0 through 8.5.100 and 7.0.43 through 7.0.109. The issue is fixed in versions 11.0.25, 10.1.58, and 9.0.121.
Potential Impact
The vulnerability can lead to WebSocket sessions remaining active even after the associated HTTP session ends, potentially allowing unauthorized continuation of session activities. The CVSS score of 6.8 (medium severity) reflects a network attack vector with high impact on confidentiality and integrity but no impact on availability. There are no known exploits in the wild at this time.
Mitigation Recommendations
Users should upgrade Apache Tomcat to versions 11.0.25, 10.1.58, or 9.0.121 or later, where this issue is fixed. No other mitigation or temporary fix is indicated. Patch status is confirmed by the vendor's recommended upgrade versions.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apache
- Date Reserved
- 2026-08-11T10:58:04.221Z
- State
- PUBLISHED
Threat ID: 6a8e15bfacd9273b49c852b6
Added to database: 08/25/2026, 22:22:55 UTC
Last enriched: 09/10/2026, 12:40:03 UTC
Last updated: 10/08/2026, 18:48:48 UTC
Views: 71
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