Tomcat Trailer Info Leak 911 (CVE-2026-88041)
CVE-2026-88041 Published on October 20, 2026
Apache Tomcat: HTTP/2 trailer header cross-contamination
Incomplete cleanup vulnerability in Apache Tomcat allowed an trailer information from a previous request to leak into a subsequent request.
This issue affects Apache Tomcat: from 11.0.0-M23 through 11.0.26, from 10.1.27 through 10.1.60, from 9.0.92 through 9.0.122.
Users are recommended to upgrade to version 11.0.27, 10.1.61 or 9.0.123, which fix the issue.
Weakness Type
What is an Insufficient Cleanup Vulnerability?
The software does not properly "clean up" and remove temporary or supporting resources after they have been used.
CVE-2026-88041 has been classified to as an Insufficient Cleanup vulnerability or weakness.
Products Associated with CVE-2026-88041
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Affected Versions
Apache Software Foundation Apache Tomcat:- Version 11.0.0-M23, <= 11.0.26 is affected.
- Version 10.1.27, <= 10.1.60 is affected.
- Version 9.0.92, <= 9.0.122 is affected.