Medium [CVE-2026-73180] 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 medium-severity Apache Software Foundation advisory covers CVE-2026-73180 affecting Apache Tomcat.
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Summary
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.
- 11.0.0-M1 through 11.0.24
- 10.1.0-M1 through 10.1.57
- 9.0.0.M1 through 9.0.120.
- 8.5.0 through 8.5.100
- 7.0.43 through 7.0.109.
- through 9.0.120
- through 7.0.109
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
- 11.0.25
- 10.1.58
- 9.0.121
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
Mitigation checklist
- Users are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121, which fix the issue.
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
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