CVE-2026-88041 PUBLISHED

Apache Tomcat: HTTP/2 trailer header cross-contamination

Assigner: apache
Reserved: 09.09.2026 Published: 20.10.2026 Updated: 20.10.2026

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.

Product Status

Vendor Apache Software Foundation
Product Apache Tomcat
Versions Default: unaffected
  • affected from 11.0.0-M23 to 11.0.26 (incl.)
  • affected from 10.1.27 to 10.1.60 (incl.)
  • affected from 9.0.92 to 9.0.122 (incl.)

Credits

  • Wentao He finder

References

Problem Types

  • CWE-459 Incomplete cleanup CWE