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Message-ID: <5a5b0d3c-1787-4104-b271-4a389b50de0c@apache.org>
Date: Tue, 25 Aug 2026 23:02:30 +0100
From: Mark Thomas <markt@...che.org>
To: oss-security@...ts.openwall.com
Subject: CVE-2026-73180: Apache Tomcat: Authenticated WebSocket session
survives end of HTTP session
Severity: low
Affected versions:
- Apache Tomcat 11.0.0-M1 through 11.0.24
- Apache Tomcat 10.1.0-M1 through 10.1.57
- Apache Tomcat 9.0.0.M1 through 9.0.120
- Apache Tomcat 8.5.0 through 8.5.100
- Apache Tomcat 7.0.43 through 7.0.109
- Apache Tomcat before 7.0.43 unaffected
Description:
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.
Credit:
0xCc.zhang (finder)
References:
https://lists.apache.org/thread/3j15vztszpyqss253mjq5v1kp7s6hooq
https://tomcat.apache.org/
https://www.cve.org/CVERecord?id=CVE-2026-73180
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